Tom Clancy's Rainbow Six: Vegas 2 is a first-person tactical shooter, the 2008 sequel of Rainbow Six: Vegas. All the weapons and features return from the prequel, along with various new ones: The player is now allowed to sprint for a short distance, customize his character more deeper, and can use new weapons and attachments. The game correctly tracks the +1 round in the chamber and most weapons feature usable fire-mode selector switches.
The following weapons appear in the video game Rainbow Six: Vegas 2:
Handguns act as tertiary weapons in the single-player campaign or terrorist hunts, and as secondaries in multiplayer. Handguns can be used in conjunction with a riot shield, or while rappelling on a rope. Pistols can be modified with high-capacity magazines, laser sights or suppressors. All pistols have unlimited ammunition in all game modes.
Beretta 92FS
The Beretta 92FS appears in the game as the "92FS", and can be fully modified. It can be seen as the sidearm used by the LVPD SWAT officers and terrorists in the game. Interestingly, the in-game 92FS has a skeleton hammer as opposed to the standard ring hammer. Also note that in all of the screencaps below, the safety switch is on.
Glock 18C
The Glock 18C appears in the game as "G18" and can be modified with a laser sight and high capacity magazines, but no suppressor. It is used as a sidearm by some terrorists, and is Gabriel Nowak's sidearm of choice. It features a full-auto fire mode unique among the pistols of the game. Its standard magazine is a 10-round low-capacity civilian magazine. Using the extended magazine attachment swaps those mags out for standard capacity 17-round mags. The real world model used for the gun in the game is a KWA airsoft G18C, which is attested to by the built in compensator on the top (only seen in the airsoft gun) and the lack of engravings. An interesting note about this gun is that when it is fired the breach is never opened, rather the integrated compensator open up and releases the spent casing/s (this is of course not the case with the real weapon.) The situation gets stranger given the fact that a much more accurately modeled G18C was used in a previous Ubisoft game, Ghost Recon Advanced Warfighter 2, which even had an appropriately-shaped muzzle flash for its compensator port.
Heckler & Koch Mark 23 Mod 0
The Heckler & Koch Mk 23 Mod 0 appears in the game as "MK.23" and can be modified like all the pistols. It is the most popular pistol on online servers. In game it is the standard sidearm used by the Rainbow team. The Mark 23 is one of the pistols that is used in every Rainbow Six video game.
Heckler & Koch USP40
The Heckler & Koch USP appears in the game as the .40 caliber variant "USP40", and can be fully modified. It is used by some of the Rainbow operatives.
IMI/Magnum Research Desert Eagle Mark I
The Desert Eagle Mark I appears simply as "Desert Eagle" in the game. It can be modified with a laser sight and high capacity magazines, but cannot accept a sound suppressor. It incorrectly holds 7 rounds (suggesting that it is the .50AE Mark XIX), despite this particular model being only chambered in .357 Mag and having a 9-round capacity. It is the side arm of some terrorists in game (Miguel Cabrero carries two, as he drops one, and then tries to pull another out - bad idea when at gunpoint), including, apparently, all the guys with bulletproof shields, and since they fire non-stop...
Taurus Raging Bull
The Taurus Raging Bull revolver appears in the game, it can only be modified with a laser. Despite being a sidearm, it is used as a main weapon by some of the terrorists in game. The one used in the game is most likely chambered for .480 Ruger due to its 6-round cylinder capacity and massive power.
Walther P99
The Walther P99 is the only new usable sidearm in the game. It is chambered in .40 S&W and holds 12+1 rounds. Can be modified like all the pistols. It is (quite rarely) seen in terrorist hands.
Colt M1911A1
A nickel plated M1911A1 can be seen on the weapon customization menu.
Submachine Guns / Personal Defense Weapons
Submachine guns offer high cycling rate, good range and damage, but terrible accuracy when blindfiring. All SMG's can be modified with suppressors, reflex scopes, ACOG's, rifle scopes, laser sights or high-capacity magazines (unless noted otherwise).
Brügger & Thomet MP-9
The Brügger & Thomet MP-9 is in the game as "MP9", it can be modified with everything.
Fabrique Nationale P90 / P90TR
The FN P90 is in the game, it can be modified with everything except the extended magazine. Has an incorrect 3-round burst fire option. Occasionally terrorists will be equipped with this weapon.
Like in Vegas, the P90 turns into a P90TR once a reflex sight, ACOG or rifle scope gets mounted on it.
Heckler & Koch MP5N
The Heckler & Koch MP5N is in the game as the "MP5N" cosign used by the United States Navy and the SEALs and is modifiable like all weapons in the game. It is used by Rainbow (especially Logan), LVPD SWAT, and by the terrorists. The In-game model is of the MP5N, meaning that the 3-round burst setting is absent from the left side of the gun making it appear as the navy model, but it has a three-round burst setting in the gun's fire mode menu, making it an MP5A5. It is available by default.
Heckler & Koch MP7A1
The Heckler & Koch MP7A1 is in the game, it can be modified with everything except the extended magazine. The MP7A1 is used with a suppressor by several Rainbow operatives; it is the secondary weapon for Jung Park when he isn't using a G36C and for Michael Walters when he isn't using a Mk.46 machine gun.
Heckler & Koch UMP45
The H&K UMP45 is in the game, it can be modified with everything. Holds 25+1 rounds and has a two-round burst mode. It is often used by terrorists later in game.
IMI Uzi
The IMI Uzi can be seen in the armory behind Bishop in the character customization, but is not usable in game. It is one of the planned weapons, see the "Cut Weapons" section below.
Ingram MAC-11
The Ingram MAC-11, referred to as the "M11" is in the game and like the other weapons, it can be modified. It is often seen in terrorist hands. One note of interest is that it's modeled after the semi-auto civilian legal M11 that is modified to full auto. Its closed bolt is the telltale sign. This machine pistol has an extremely high rate of fire and is difficult to control given that its stock cannot be extended.
Česká Zbrojovka SA Vz.83 Skorpion
The SA Vz.83 Skorpion appears in the game as the "Skorpion VZ83" chambered in .380 ACP, and can be modified with everything except for the ACOG. It is occasionally used by terrorists in game. PC version allows for semi-auto fire as well as the default full-auto option, but sights must be reset after EVERY shot as the weapon becomes misaligned after the first shot is fired in semi-auto mode.
Steyr AUG Para
The Steyr AUG Para is seen in the game as a submachine gun with a high cyclic rate, and can be modified with everything. Holds only 25 rounds by default. It is used by LVPD SWAT and by terrorists.
Type 05 JS
The QCQ-05 appears in the game. It is one of the more powerful submachine guns in game, has a 3-round burst mode and can be modified with everything except for the high capacity magazine (which it certainly does not need). The Type 05 can be seen in terrorist hands in game.
Shotguns
Shotguns offer devastating power from short to medium ranges. Unlike in many video games, shotguns have realistic range, and can kill enemies not only from point-blank range. Shotguns can be modified with reflex sights, scopes (ACOG and rifle) or laser sights. For an unknown reason, the +1 shell in the chamber is not counted for the pump-action shotguns.
Benelli M3 Super 90
The Benelli M3 Super 90 appears in the game as "M3". Holds 8 shells and is incorrectly portrayed as pump-action only.
Daewoo USAS-12
Another cut weapon is the USAS-12. It can be seen in the armory behind Bishop in the character customization, but is not usable in game.
Franchi SPAS-12
The Franchi SPAS-12 appears in the game as "SPAS 12". Like in most video games, it operates in pump-action mode only while the actual SPAS is a select-fire semi-auto/pump-action shotgun. Appears with an 8-round military tube.
C-More Systems M26 Modular Accessory Shotgun System
The stand-alone version of the M26 Modular Accessory Shotgun System appears in the game as "M26 LSS". Puzzlingly, the M26 in the game is select-fire, while the real one is a straight-pull bolt action.
Mossberg 500
The Mossberg 500 appears in the game as the "500 Tactical". Is fitted with a heat-shield and can be fully modified. It is used often by the terrorists in the game. It is the last weapon to be unlocked with CQB Points.
Remington 870 MCS
The MCS variant of the Remington 870 shotgun appears in the game. Terrorists use this weapon fairly often.
Assault Rifles / Battle Rifles
Assault and battle rifles can be modified with reflex sights, suppressors, ACOG's, 6X scopes, lasers and high-capacity magazines.
AK-47
The AK-47 is one of the most powerful weapons in the game. It is incorrectly modeled with 5.45x39mm round AK-74-type magazines.
AKS-74U
The AKS-74U is a new assault rifle available for use. It can be seen in terrorist hands in the game. Appears with steel magazines. It is the most popular gun online. In the trailers, it says the AKS-74U is chambered in 7.62x39mm, but in game, it doesn't share ammo with the AK-47, so it might have been fixed when the game was actually released. Also, the handguard is wrong for the AKS-74U, because it has two vent holes, like the handguard of the AK-47.
Barret M468
The Barrett M468 is one of the new additions to the Rainbow arsenal. It can be seen used by terrorists in the Nevada Desert in game. Appears as "M468". Note that the selector only has "SAFE" and "FIRE" positions. The lower receiver also lacks a hole for the autosear above the selector, despite the weapon's full auto capability in-game.
Enfield L85A2
The L85A2 can be seen in game and can be equipped with everything. A Rainbow operative can be seen using this rifle in one of the game's levels. The L85A2 has the sound of the AK-47 from the original Rainbow Six: Vegas, despite having two different calibers.
Fabrique Nationale FNC 80
The FN FNC is one of the assault rifles in the game, and can be equipped with all add-ons. It is sometimes used by Rainbow operatives and is very often used by the terrorists.
Fabrique Nationale SCAR-H CQC
The First Generation FN SCAR-H CQC is in the game, it can be modified with everything. It still holds an incorrect 30 rounds. It is extensively used by Rainbow and is often seen in terrorist use. It is Gabriel Nowak's weapon of choice along with his MP5N in the earlier missions prior to the events in Rainbow Six: Vegas 2.
GIAT FAMAS F1
The FAMAS is in the game, it can be modified with everything. It can sometimes be seen in terrorist hands.
Heckler & Koch G3KA4
The Heckler & Koch G3KA4 is in the game, it can be modified with everything. It is occasionally used by terrorists. There are some inaccuracies in that it has a 30 round magazine capacity despite being modeled with the 20-round magazine.
Heckler & Koch G36C
The Heckler & Koch G36C is in the game, it can be modified with everything. It is teammate Jung Park's primary weapon.
Heckler & Koch XM8
The Heckler & Koch XM8 is in the game as the "M8", it can be modified with everything. It is obtained late in the game, and Bishop him/herself is the only user of this weapon. It is seen as having an accessory rail that extends to the end of the carrying handle.
SIG SG 552
The SIG SG 552 appears in the game as the "552 Commando" and can be modified with everything. It is one of the assault rifles used by the Rainbow team (it is the preferred rifle of both Logan and Chavez) and is also sometimes used by terrorists. Like in most games, it has a 30 round magazine capacity despite being modeled with the 20-round mag. Apparently not a single development team has seen what the 30-round mag looks like (it extends past the pistol grip in terms of height).
Steyr AUG A3
The Steyr AUG A3 is in the game as the "AUG A3" and can be modified with everything. It is occasionally used by the terrorists.
IMI Tavor TAR-21
The Tavor TAR-21 is in the game and can be modified with everything. Now it correctly appears as "TAR21", not as "MTAR21" as in the prequel. It is very popular on online servers due to their high rate of fire. Strangely, you cannot use it without the MARS sight. It has no iron sights in the first game either. An upside to this is that you can use either of the non-optical attachments while having the MARS sight as well. It is sometimes used by Rainbow operatives and is quite common in terrorist use.
IMI Tavor MTAR-21 Prototype
The TAR-21 (still) shows up as the MTAR-21 Prototype during the weapon selection quick-menu.
Sniper Rifles
Sniper rifles can be modified with 6X, 12X or variable zoom (6X and 12X) scopes.
Accuracy International AS50
The Accuracy International AS50 can be seen in the armory behind Bishop in the character customization, but is not usable in game.
The Heckler & Koch PSG-1 is in the game, but is limited to hold 5 rounds. The PSG-1 is the standard Rainbow sniper rifle.
Izhmash SV-98
The Izhmash SV-98 appears in the game. It is often used by terrorist snipers in game.
Knight's Armament Company SR-25
The Knight's Armament SR-25 appears in the game as "SR-25 SD" and is fitted with a non-removable suppressor. It holds only 5 rounds. Can be seen used by Rainbow operatives in game. Unlike any other weapon in the game, it does not eject empty casings when fired, probably due to a coding glitch.
Remington/USMC M40A1
The M40A1 sniper rifle appears in the game with a wooden camouflage finish, and like the other sniper rifles, it can be modified with bigger scopes. The rifle is incorrectly portrayed with a 5-round detachable box magazine instead of the internal mag. It is used by a terrorist sniper in the Refinery.
Steyr Scout Tactical
The Scout Tactical appears in the game as "Scout Tactical". A few of the terrorist snipers use this rifle.
Machine Guns
Machine guns offer moderate damage, high ammunition capacity, but slow reload. MG's can be modified with reflex scopes, laser sights, rifle scopes and recoil control stocks. All machine guns are limited to full-auto fire and have a capacity of 100 rounds (100+1 for the MG36).
Heckler & Koch HK21E
The Heckler & Koch HK21E is in the game as "21E". It is used by the terrorists often. Despite the appearance of a fire-selector switch and the appropriate markings, the HK21E is restricted to full-auto fire.
Heckler & Koch MG36
The Heckler & Koch MG36 is frequently used by enemies in the game. Despite being based on a regular G36 rifle, the MG36 is restricted to full-auto only, even though the real weapon can fire in semi-auto, full-auto and optional 2-round burst modes. The gun is correctly portrayed with usable selector switch in the Ghost Recon series, another title endorsed by Tom Clancy.
FN M249 SPW
The M249 SPW is in the game as "M249 SPW". It is fitted with an E2-type butt-stock, while the real SPW has a Para-type collapsible stock. (Strangely though, it appears with collapsible stock on the weapon selection quick-menu.)
The M249 SPW sometimes appears as an emplaced turret.
FN MK 46 Mod 0
The Mk 46 Mod 0 appears in the game as "MK46". It is the squad support weapon of choice for Rainbow and is used by Michael Walters in Bishop's team.
Explosives
M67 Hand Grenade
The M67 is the resident fragmentation grenade in the game.
AN/M14 Incendiary Grenade
The AN/M14 incendiary grenade sets it's victims on fire. Also disrupts thermal vision for a short time.
M84 Flashbang Grenade
M18 Smoke Grenade
Can be used to lay down smoke screen. Often used by terrorists.
Breaching Charge
Used to breach locked doors. Teammates can also be ordered to use them.
C4 Charge
Remotely detonated explosive charge.
Other Weapons
Unknown Rocket Launcher
At the train station, the terrorists fire a rocket at the player. It is unknown what weapon it is, because the player only sees the rocket coming towards him.
Cut Weapons
The following weapons didn't make it to the final version of the game, yet their icons can be found among the files for the PC version. Some of these guns can be seen behind Bishop during weapon selection.