XM307 & XM312 - Revision history

Evil Tim at 18:20, 14 August 2018

2018-08-14T18:20:45Z

← Older revision		Revision as of 18:20, 14 August 2018
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round was used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The weapon's "differential firing" recoil-offsetting system was similar in concept to API blowback, but used the barrel and more or less the entire action of the gun instead of just the bolt as the recoil-offsetting component, working rather like a [[Heckler & Koch G11]] in reverse. The barrel group was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the group before it could have further effect on the weapon. The XM307 was gas operated, while at the time of cancellation the XM312 was using a weird hybrid system with recoil-operated feeding but a gas-operated bolt. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312 and succeeded in removing the gas-operated bolt; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.		The weapon's "differential firing" recoil-offsetting system was similar in concept to API blowback, but used the barrel and more or less the entire action of the gun instead of just the bolt as the recoil-offsetting component, working rather like a [[Heckler & Koch G11]] in reverse. The barrel group was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the group before it could have further effect on the weapon. The XM307 was gas operated, while at the time of cancellation the XM312 was using a weird hybrid system with recoil-operated feeding but a gas-operated bolt. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312 and succeeded in removing the gas-operated bolt; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.

Evil Tim at 17:36, 28 January 2018

2018-01-28T17:36:30Z

← Older revision		Revision as of 17:36, 28 January 2018
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The weapon's "differential firing" recoil-offsetting system was similar in concept to API blowback, but used the barrel instead of the bolt as the recoil-offsetting component. The barrel group was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the ~~barrel~~ before it could have further effect on the weapon. The XM307 was gas operated, while at the time of cancellation the XM312 was using a weird hybrid system with recoil-operated feeding but a gas-operated bolt. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312 and succeeded in removing the gas-operated bolt; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.		The weapon's "differential firing" recoil-offsetting system was similar in concept to API blowback, but used the barrel and more or less the entire action of the gun instead of just the bolt as the recoil-offsetting component, working rather like a [[Heckler & Koch G11]] in reverse. The barrel group was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the group before it could have further effect on the weapon. The XM307 was gas operated, while at the time of cancellation the XM312 was using a weird hybrid system with recoil-operated feeding but a gas-operated bolt. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312 and succeeded in removing the gas-operated bolt; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.

	The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM307 / XM312 and the XM806.		The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM307 / XM312 and the XM806.

Evil Tim at 17:14, 28 January 2018

2018-01-28T17:14:00Z

← Older revision		Revision as of 17:14, 28 January 2018
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The ~~system~~'s recoil-offsetting system used ~~a moving~~ barrel ~~which~~ was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.		The weapon's "differential firing" recoil-offsetting system was similar in concept to API blowback, but used the barrel instead of the bolt as the recoil-offsetting component. The barrel group was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. The XM307 was gas operated, while at the time of cancellation the XM312 was using a weird hybrid system with recoil-operated feeding but a gas-operated bolt. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312 and succeeded in removing the gas-operated bolt; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.

	The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM307 / XM312 and the XM806.		The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM307 / XM312 and the XM806.

Evil Tim at 18:40, 12 December 2017

2017-12-12T18:40:12Z

← Older revision		Revision as of 18:40, 12 December 2017
Line 3:		Line 3:
	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.

	The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM312 and XM806.		The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM307 / XM312 and the XM806.

	{{Gun Title}}		{{Gun Title}}

Evil Tim at 18:39, 12 December 2017

2017-12-12T18:39:28Z

← Older revision		Revision as of 18:39, 12 December 2017
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of the XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.

			The [[General Dynamics Lightweight Medium Machine Gun]] uses a variant of the same recoil-mitigating technology, and appears to have finally solved the rate-of-fire issues that killed the XM312 and XM806.

	{{Gun Title}}		{{Gun Title}}

Evil Tim at 06:38, 3 November 2017

2017-11-03T06:38:43Z

← Older revision		Revision as of 06:38, 3 November 2017
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, a subsection of the Objective Force Warrior plan which was intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. ~~The only surviving part~~ of ~~the~~ XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle." ~~The~~ current status of the XM109 project is not clear.		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. Only two parts of XM307 program survive: the first is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle," though the current status of the XM109 project is not clear. The other is the lightweight tripod used on the XM307, XM312 and XM806, which went by the name XM205. With some alterations, this has been adopted as the M205, and is planned to replace the heavier M3 tripod used by the Browning M2 and Mark 19 grenade launcher.

	{{Gun Title}}		{{Gun Title}}

Evil Tim at 09:43, 15 December 2015

2015-12-15T09:43:35Z

← Older revision		Revision as of 09:43, 15 December 2015
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. A ~~later~~ program for a lightweight M2 supplement, the XM806, used some of the technology ~~seen~~ in the XM312; this project was itself cancelled in 2012 following delays, in favour of upgrading existing stocks of M2s. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle."		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation in 2008. A follow-on program for a lightweight M2 supplement, the XM806, used some of the technology used in the XM312; this project was itself cancelled in 2012 following delays and criticism of the XM806's still-low rate of fire (265rpm), in favour of upgrading existing stocks of M2s. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle." The current status of the XM109 project is not clear.

	{{Gun Title}}		{{Gun Title}}

Evil Tim at 02:39, 22 May 2015

2015-05-22T02:39:11Z

← Older revision		Revision as of 02:39, 22 May 2015
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	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. A later program for a lightweight M2 supplement, the XM806, used some of the technology seen in the XM312; this project was itself cancelled in 2012 in favour of upgrading existing stocks of M2s. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle."		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. A later program for a lightweight M2 supplement, the XM806, used some of the technology seen in the XM312; this project was itself cancelled in 2012 following delays, in favour of upgrading existing stocks of M2s. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle."

	{{Gun Title}}		{{Gun Title}}

Evil Tim at 02:38, 22 May 2015

2015-05-22T02:38:02Z

← Older revision		Revision as of 02:38, 22 May 2015
Line 1:		Line 1:
	The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. ~~The current US project~~ for a lightweight M2 supplement, the XM806, ~~uses~~ some of the technology seen in the XM312. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle."		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. A later program for a lightweight M2 supplement, the XM806, used some of the technology seen in the XM312; this project was itself cancelled in 2012 in favour of upgrading existing stocks of M2s. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle."

	{{Gun Title}}		{{Gun Title}}

StanTheMan at 00:55, 7 April 2015

2015-04-07T00:55:33Z

← Older revision		Revision as of 00:55, 7 April 2015
Line 1:		Line 1:
	XM307 ~~and~~ XM312 were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of M2 heavy machine guns and ~~Mark~~ 19 grenade ~~launchers~~. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm ~~computerised~~ HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.		The '''XM307 & XM312''' were two weapons developed as part of the US Military's cancelled Objective Crew Served Weapon (OCSW) project, intended to supplement or replace existing stocks of [[Browning M2\|M2HB heavy machine guns]] and [[Mk 19 grenade launcher]]s. The XM307 was also known as the Advanced Crew Served Weapon (ACSW), and fired a 25x59mm computerized HEAB round; a lower-velocity 25x40mm version of this round is used by the [[Heckler & Koch XM25]] and was used by later versions of the equally ill-fated [[Heckler & Koch XM29 Objective Individual Combat Weapon]]. The XM307 was able to be converted to the .50 BMG XM312 configuration or vice versa by swapping a small number of parts, in a operation taking a trained crew less than two minutes.

	The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. The current US project for a lightweight M2 supplement, the XM806, uses some of the technology seen in the XM312. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in ~~Barrett's~~ [[Barrett ~~XM109\|~~XM109]] Objective Sniper Weapon or "Payload Rifle."		The system's recoil-offsetting system used a moving barrel which was released from the rearward position to travel forward as the weapon fired, forcing recoil to arrest the forward momentum of the barrel before it could have further effect on the weapon. While this resulted in high accuracy and low felt recoil in a system much lighter than the Browning M2, it also resulted in a low rate of fire (260 rpm); this and issues with meeting the system's 40-pound weight goal led to the project's cancellation. The current US project for a lightweight M2 supplement, the XM806, uses some of the technology seen in the XM312. The only surviving part of the XM307 program is the 25x59mm high-velocity round, which is planned for use in the [[Barrett XM109]] Objective Sniper Weapon or "Payload Rifle."

	~~'''The XM307 and / or XM312 can be seen in the following:'''~~		{{Gun Title}}
	~~__TOC__<br clear="all">~~

	=XM307 ACSW=		__TOC__<br clear=all>

			==XM307 ACSW==
	[[Image:Xm30750cal.jpg\|thumb\|right\|400px\|XM307 ACSW - 25x59mm HEAB]]		[[Image:Xm30750cal.jpg\|thumb\|right\|400px\|XM307 ACSW - 25x59mm HEAB]]

	=== Television ===		===Television===
	{\| class="wikitable" style="font-size: 95%;" border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:left; font-size: 95%"		{\| class="wikitable" style="font-size: 95%;" border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:left; font-size: 95%"
	\|-bgcolor=#D0E7FF		\|-bgcolor=#D0E7FF
Line 37:		Line 38:
	<br clear="all">		<br clear="all">

	=XM312=		==XM312==
	[[Image:XM312hmg.jpg\|thumb\|right\|400px\|XM312 - .50 BMG]]		[[Image:XM312hmg.jpg\|thumb\|right\|400px\|XM312 - .50 BMG]]

	=== Television ===		===Television===
	{\| class="wikitable" style="font-size: 95%;" border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:left; font-size: 95%"		{\| class="wikitable" style="font-size: 95%;" border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:left; font-size: 95%"
	\|-bgcolor=#D0E7FF		\|-bgcolor=#D0E7FF