A weapon of the M1911 pistol series, that holds 7 rounds and is the secondary weapon of Hoss, Junior, and Cherry/Doc.
It can be fitted with a suppressor. Appears as the "M1911 Pistol" and "M1911 Silenced Pistol".
Makarov PM
Some enemy soldiers in the game will be using the Makarov PM and it holds 8 rounds.
Smith & Wesson Model 10
The Smith & Wesson Model 10-5 six shot revolver is Maj. Wallace's main weapon during 1st Air Cav, and after they are captured is used in the cutscene for Russian Roulette. It's also found at the start of The Citadel from the corpse of a US Pilot.
The Sterling-Patchett L34A1 Mark V Silenced SMG, used by the Australian SAS and SGT Stone, holds 34 rounds. This weapon was cut from being used by the player as if the game is modded, it has proper weapon icons for being in the inventory.
Shotguns
Remington 870
The Remington 870 appears as the "12-gauge Shotgun", Ragman's secondary weapon. The shotgun in-game holds 7 rounds whereas it is modeled with a standard 4-round magazine. Other features include the non-functional Surefire weaponlight (in real life appeared only in 1985) and vent rib.
The XM177E1 appears in game and replaces Ragman's M3 Grease Gun in later missions. It holds 30 rounds, has full or semi-automatic modes of fire.
M16A1
The M16A1 Rifle of the M16 rifle series which holds 20 rounds and has two fire modes, 3-shot burst (instead of full automatic mode) and semi-automatic, is Cherry/Doc's main weapon. It's also is used by most other U.S. soldiers in the game. Appears as the "M16A1 Assault Rifle".
Mosin Nagant
The Mosin Nagant Rifle is bolt action and holds 5 rounds. It's model looks like is originally was the M1907 Carbine, stretched to the length of a long rifle, which leads to a rather strange outlook of this.
SKS
The SKS rifle is semi-automatic only and holds 10 rounds.
The bolt action M40A1 Sniper Rifle, based on the Remington Model 700, holds 5 rounds. It's also incorrectly shown in the game as a semi-automatic, with a wood stock and a detachable magazine.
SVD Dragunov
The SVD Dragunov sniper rifle holds 10 Rounds. Judging by the textures, this was modeled on the PSL, modified to look like SVD.
XM21 Sniper Weapon System
Junior's main weapon, the XM21 SWS, is an M14 Rifle attached with a scope that fires semi-auto only, and holds 20 rounds. The weapon, incorrectly called the "M14 Sniper Rifle" in the game, is also incorrect for use as a sniper rifle as it was being developed and fielded in 1969 and the game is set in 1968.
Machine Guns
M60
The M60 machine gun is Hoss's main weapon and can be found mounted on the PBR MK II during Charlie's Point and the UH-1D during Air Mobile. It holds 100 rounds(handheld), 500 rounds(UH-1D) or 1000 rounds(PBR MK II).
The Russian Smoke Grenade discharges a grey smoke and can be found in some of the enemy's weapons caches throughout the game. It's also the only weapon playable by the player found in the game that might not be simulating a specific real world weapon.
TM-62M
The TM-62 anti-tank mine can be found as a "booby trap" during Russian Roulette. It's playable by the player when disarmed.
The Browning M1919 .30 cal machine gun mounted on top of the M50 Ontos holds 250 rounds.
Browning M2 Heavy Barrel
The Browning M2 Heavy Barrel can be seen mounted on a tripod in the perimeter bunkers of the Firebase and LZ Mike, and vehicle-mounted on the M113 APC (not used in the game), the M48A3 Patton tank, and twin-mounted at the front and single-mounted at the rear of the PBR MK II. It holds 100 rounds (tripod), 800 rounds (M48A3), or 2000 rounds (PBR MK II)
Browning M2HB on M3 tripod
Dual Browning M2HB in PBR
DShK
The DShK heavy machine gun can be seen mounted on the NVA Jeep, T-34-85 tanks(not playable by the player), and on a tripod in many enemy fortifications throughout the game, holds 100 rounds(tripod) or 250 rounds(Jeep).
M2 Mortar
The M2 Mortar can be used a few times in the game and requires two squad members to aim and fire. It has 30 rounds.
M2A1 (M101A1)
The artillery piece being fired by two U.S. soldiers in the Firebase inner compound during Ghost Town is an M2A1(M101A1) 105mm Howitzer. This weapon is not playable by the player.
Maxim M1910
The Maxim M1910/30 machine gun that can be found being used by the enemy during many of the missions holds 250 rounds.
ZPU-4
There are two KPV heavy machine guns in ZPU-4 quad anti-aircraft mountings found in the mission Hill 933 in which it shot down a UH-1 medevac. It holds 500 rounds.
Other
Located at various places in enemy occupied territory throughout the game are many different types of booby traps. The types of booby traps that can be found include an improvised explosive device triggered by a trip wire and naval mines. Another IED can be seen at the beginning of Tet Offensive, when several VC suicide bombers(called "sappers" in the game) rush the bunker you are defending. Each of them armed only with what appears to be a high-explosive shell attached to the tip of a bamboo spear, which they will attempt to use as a "lunge mine". All of these weapons and explosive devices appear to be generic in design(not simulating any specific real world weapons or explosive devices), and can only be disarmed or destroyed by the player.
AH-1G Cobra
A Bell AH-1G Cobra attack helicopter armed with two M260 70mm rocket launchers can be seen using them to strafe the enemy and their vehicles on many occasions throughout the game. This aircraft and its armaments are not playable by the player.
M48A3 Patton
The M48A3 Patton Tank found during Bloody Hue is armed with a T54 90mm tank gun which holds 50 rounds.
M50 Ontos
Six M40A1 106mm recoilless rifles are mounted on the M50 Ontos at the start of The Citadel which holds 50 rounds.
MIM-23 Hawk
During Air Mobile one of your mission objectives is to destroy a number of captured M192 towed triple-missile launcher batteries, carrying Raytheon MIM-23A Hawk medium range SAM (Surface-to-Air Missile), being used by the enemy. This weapon is not playable by the player.
T-34-85
The T-34-85 tank used by the enemy throughout the game is armed with an M1940 F-34 76.2mm tank gun. This vehicle and its armaments are not playable by the player.