Battlefield: Bad Company 2: Vietnam is an expansion pack for the original game that takes place during the Vietnam War. It was released in December 2010 as a multiplayer-only DLC and requires BF: BC2 to work.
The first level of the singleplayer campaign, "Operation Aurora," is set in WWII. Many of the weapons in that level are recycled from Battlefield: 1943, and are generally unusable in multiplayer or unusable by the player at all.
The Beretta M9 is a standard semi-automatic pistol. It had a correct 15 round magazine in the Beta, but reverted to the incorrect 12-round mag for the release game (the same thing happened in Medal of Honor 2010's multiplayer, also from DICE). As of the final R7 patch, its damage has been increased to reflect the in-game stat difference between it and the MP-443. One way to explain the 12 round mag and higher damage than the 9mm MP-443 is DICE has instead dressed up a Beretta 96 as the M9. In addition the hammer is never shown cocked, even when fired, as if it were double-action only.
The AN-94 with a GP-30 returns, now as the standard service rifle for the Russian Army in the story (replacing the AEK-971 in that role in the prior game). It is permanently set to the two-round burst mode, but incorrectly fires at the full-auto mode's 600 RPM instead of the burst mode's much higher fire rate. The AN-94 is unlocked at 28,000 score in the Assault class in multiplayer.
The FN SCAR-L CQC assault rifle is the first unlockable weapon for the Engineer in multiplayer (at 2,500 points), and found occasionally in the campaign mode. Russian SF troops can be seen using it in the Zero Dark Thirty mission. When firing bursts of automatic fire, the weapon ejects casings at a faster rate than it fires and cycles. This is probably due to it reusing scripts from Battlefield: Bad Company, in which it had a faster ROF.
Referred as the M416. Apparently in the Bad Company universe, the Heckler & Koch HK416 weapon has been adopted by the US Army, thus the M416 designation. It is unlocked at 35,000 Assault class score. A well-balanced and versatile rifle, the HK416 is popular in multiplayer and can be outfitted with standard assault rifle attachments, such as a red dot sight, 4x scope and underslung M203, capable of firing flechette, HE or smoke rounds.
A G3A3 appears simply as the "G3" and is only available as a multiplayer unlock. Despite claiming to be unlocked at Rank 26, players really unlock it at Rank 22, the first officer rank. It has a 20-round magazine and full-auto fire capability. It can be set to any class' primary slot. Elite tier Russian forces use the G3A3 in Onslaught mode.
Unusually, the game allows the weapon to be reloaded partway through an en-bloc clip by using the clip latch. There is no model for an empty or partially fired clip, so regardless of how many rounds have been fired the Type 5 is always shown ejecting a completely full clip at the start of the reload animation, in contrast to the Garand's clip, which is always shown as empty. Unlike in Battlefield: 1943, ejecting a clip does not produce a ping sound.
Called the "SPAS-12 Combat" in the game - it is found early on in Heart of Darkness, and is unlocked at Rank 18 (Master Sergeant III) in MP. The Franchi SPAS-12 has the same damage statistics as the 870 MCS and NS2000, and operates only in pump-action mode. Judging by its barrel length, it is the compact variant, however it incorrectly holds 8 rounds in singleplayer and in multiplayer (when equipped with the "extended magazine tube" perk). The description states that "it's been in service for over 37 years"; with the real SPAS-12 having entered service in 1979, this suggests that the game is set after 2016.
Called the "Neostead 2000 Combat" in the game. The NeoStead 2000 has a four shot mag tube as standard, increased to eight with extended mags. Statistically, it is identical to the SPAS-12 and 870 MCS but comes with two advantages: its users cycle it faster than any of the other pump-action shotguns and it is reloaded two shells at a time (regardless if the player reloads it with an odd amount of rounds left in the weapon). It is only in Multiplayer, unlocked at Rank 20, First Sergeant II.
The TOZ-194 is available in the PS3 and PC beta, but only usable in Single Player in the full game. The shotgun has a capacity of 8 shots, one more round than its real-life counterpart. A version that fires slugs can also be found in singleplayer, although fired slugs seem to explode on impact, making it quite useful as an accurate "power weapon". In the game's multiplayer beta, the TOZ-194 would have been available as a usable weapon, but was likely removed due to it having very similar stats to the SPAS-12, NeoStead 200 and M870 MCS.
Called the "USAS-12 Automatic" in the game. The USAS-12 has same mag capacities as the Saiga-20K. It can occasionally be found on weapon crates in the campaign, and is used by Russian spec-ops soldiers late in the campaign. The USAS is the last unlocked shotgun, at level 21 (First Sergeant III). The USAS-12 is modelled with a 10-round magazine but incorrectly holds 12 in both singleplayer and multiplayer. In the latter however, the USAS will hold 6 rounds at a time when not equipped with the "extended shotgun magazine" perk.
The Carl Gustav M3 returns as an Anti-Tank recoilless rifle. In the story, it is used universally by both the South American and Russian forces despite the presence of the RPG-7 on AT/Engineer character models. In multiplayer, it is unlocked at 8,700 score with the Engineer class. Like the RPG-7, it can be used as a guided rocket launcher in combination with the Tracer Dart Gun. It is erroneously referred as the M2 model, which is distinguished from the M3 model by its lack of a carrying handle.
BGM-71 TOWs are used the antitank missile for the US Army. They appear mostly in multiplayer as static emplacements. Some of the Humvees in High Value Target sport TOW turrets. The only usable appearance of the TOW Humvee is on Atacama Desert in the console-only Onslaught mode.It is also usable on the M2A3 Bradley with the "V ALT W" specialization.
The M167 VADS was introduced in a June 8th update, appearing in the multiplayer stats section and added in the Map Pack 4 levels, Atacama Desert Rush and Port Valdez Conquest. A cut "ACV-S" M113 that mounted the VADS was supposed to appear as the US Army's AA vehicle, but the only trace left is a menu entry picture in the game files and in the image for the vehicle perks shortcut upgrade in the game store.USMC F/A-18A Hornets (which carry a M61A1 Vulcan) from Battlefield 2 appear in the story and in some scripted scenarios in Multiplayer.
The emplaced version of the QLZ-87 was originally found only in the single player game. In an update on the 8th of June, it was added to the multiplayer stats section, and was added to multiplayer proper with the Onslaught DLC, where it appeared on the Atacama Desert and Isla Inocentes maps.
The XM307 ACSW is found mounted on the CAV and a pair are mounted on the Patrol Boat. In an update on the 8th of June, the standalone XM307 has been added to the multiplayer stats section, and has been added to the game in Map Pack 4. In the stats section it is incorrectly named an XM306, but in the killfeed it says XM307 like it should.
The ZU-23-2 is used as the standard AA emplacement throughout the game. It mostly appears in the Heavy Metal and High Value Target missions in the campaign, and in several multiplayer levels. The Russian Forces have a BMD-3 with a ZU-23 turret as their unique AA vehicle in a few scenarios.
The AK-47 appears in the expansion as an other usable assault rifle. It is very popular in the game due to its high damage and moderate accuracy. The model appears to be derived from the AK that appears in Medal of Honor (2010)'s multiplayer.
The M40 Sniper Rifle is the most powerful non-explosive weapon in the game capable of killing anyone in one shot to the head or chest. Its only drawback is the 5-round capacity and slow (bolt-action) rate of fire. The rifle is incorrectly portrayed with a 5-round detachable box magazine instead of the internal magazine; this is because it is another weapon model shared between Bad Company 2: Vietnam and Medal of Honor (2010), specifically the M24 in MoH's multiplayer.
The Norinco NDM-86 is used by the Recon class. Holds 10 rounds and has a stronger default scope than any other sniper rifle in the game. It is incorrectly identified as a SVD in-game when in-fact it is a Norinco NDM-86, a .308 version made in China, using straight magazines. This particular model would be anachronistic, and was probably shared from Medal of Honor (2010)'s multiplayer. 2b1af7f3a8