In the beginning of the single-player mission that was shown during gameplay footage, a Marine who is sitting in front of the player has a Beretta M9 pistol holstered to his vest. It can also be seen in the multiplayer footage of E3 that the player is reloading his M9. Another note of interest is that unlike Battlefield: Bad Company 2 and Medal of Honor, the M9's magazine has 15 rounds + 1 in the chamber like it should be. An M9 fitted with a suppressor can be seen in the Co-op trailer.
Error creating thumbnail: File missingBeretta M9 - 9x19mm.File:Bf3 pistol m9.pngA Beretta M9 holstered to a Marine's vest's is circled in red. Also note that the same U.S. Marine is inaccurately shown to have a U.S. Flag Patch on his sleeve. In reality, U.S. Marines do not wear flag or unit patches on their sleeves.File:BF3-M9.jpgM9 being reload by the player in multiplayer footage.File:Bf3m92.JPGM9 fitted with suppressor used by the player in co-op footage.
MP-443 Grach
The MP-443 apparently returns from Bad Company 2, as it's briefly visible in the multiplayer kill list in the "Operation Métro" trailer.
Error creating thumbnail: File missingFN P90TR - 5.7x28mmFile:Battp90.jpgSoldier wielding the FN P90TR. Notice that the magazine in the P90 is not locked inside the mechanism but inside the weapon itself(!). This is probably just a model error only within the alpha version of the game. It also appears to be a tad over-sized to.
Assault Rifles
Colt M16A4
The M16A4 rifle was shown during early gameplay footage but was lacking rear iron sights. This is because the game was still under early alpha development. It was later confirmed that both M16A3 and M16A4 will be available for use within the game.
Error creating thumbnail: File missingM16A4 MWS (Modular Weapon System) with RAS rails installed, AN/PEQ-2 IR designator, RIS foregrip, and Trijicon 4x32 ACOG scope - 5.56x45mm. This is the USMC style setup.File:M16BF3Teaser.jpgThe Marine on the top middle of the screen, is carrying an M16A4 during the briefing scene; note the lack of rear iron sight or even optical sight.File:Eapwned m16a4.jpgA demonstration of the character's movement animation, also using an M16A4 with carrying handle on it. You can also note a Magpul attached to the magazine.File:M4nosight.jpgIn this picture, it seems that the developers have removed the front gas block like in Call of Duty. So in this case, the rifle would not properly function like in reality. This has since been fixed by having the front sight disappear when aiming.
Colt M4A1
The M4A1 Carbine is commonly seen in gameplay footage which is also in the hands of the main character. Because of the alpha stages, the in-game M4A1 can be seen fitted with iron sights, EOtech 551 Holographic sight, Trijicon 4x32 ACOG scope, Surefire Universal Weaponlight, AN/PEQ-2 laser designator, Magpul Ranger Plate and an unknown stock (possibly a painted LE stock or Magpul CTR stock). Two different "reload-from-empty" animations currently exist. The "Fault Line" trailers had the player rack the charging handle, while the Operation Metro trailer, and the PS3 Fault Line gameplay from the June 16th, 2011 edition of Jimmy Fallon's Late Night show had the player use the bolt release button. Another thing to note, the M4 depicted in the Operation Metro trailer has full iron sights and has not been seen with an optic. Not to be mistaken with the M16A3 in the trailers, which is lacking a front sight post/gas block with the ACOG.
The PLR insurgents using an unknown variant of the AK rifle series.
Error creating thumbnail: File missingType I AK-47, hybrid stamped/milled receiver with prototype slab sided magazine - 7.62x39mm.File:Bf6.jpgAn enemy soldier in the background is seen using an unknown AK variant.
The FN MK 17, or SCAR-H can be seen in the new Caspian Border gameplay trailer.
File:2fff2537c0.jpgThird Generation Fabrique Nationale SCAR-H CQC - 7.62x51mm NATOFile:BF3Scar.jpgThe player reloads a SCAR-H with a Trijicon RX01 reflex sight and RIS foregrip in the recent Caspian Border gameplay trailer.
Machine Guns
M240B Machine Gun
The M240B appears in the hands of some U.S. Marines, and in the hands of the player, fitted with an EOtech 551 Holographic sight. The trailer shows the weapon as having a deployable bipod which can be used to increase accuracy during prolonged firing, at the cost of player mobility.
Error creating thumbnail: File missingM240B with newer style lower handguard (designed to attach RIS rails via hex nut) - 7.62x51mm NATOFile:BF3TeaserM249.jpgThe player uses an M240B fitted with an EOTech holographic sight while engaging multiple enemies in the teaser video.File:Bf6.jpgA U.S. Marine in the foreground is seen using an M240B.File:2401.jpgFull view of the M240B as seen in the recent Fault Line 3 trailer
PKP Pecheneg
The PKP Pecheneg has been seen in gameplay trailers.
The Mk. 46 Mod 0/M249 SAW was seen in E3 multiplayer footage. Because of the sticking out rail on the top of the handguard, this likely to be the Mk. 46 Mod 0.
File:Mk46.jpgMk 46 Mod 0 light machine gun - 5.56x45mmFile:BF3-M249.jpgMk. 46 Mod/M249 SAW used by the player in E3 multiplayer footage. Note the M145 ELCAN scope.
QJY-88
The Norinco QJY-88 returns from Bad Company 2, once again called the "Type 88 LMG". It appears in the material marketing the pre-order rewards.
The Armsel Striker is included, identifiable by the winding key on the front of the drum magazine. The weapon is referred to as the "DAO-12" in material advertising the game's pre-order rewards, as it was in Battlefield 2; this stands for "double action only, 12 gauge" and is a description of the weapon rather than a correct name for it.
The M136 AT4 appears in the hands of US Marines. In the trailer, it seems to have a pistol grip instead of having the trigger on the back of the weapon behind the sights.
The Browning M2HB heavy machine gun appears in the game mounted on vehicles, including M1A2 Abrams tanks. The Abrams appear to be fitted with a remote mounting for the M2HB allowing the Commander to fire the weapon from inside the safety of the turret, a feature recently implemented on real-life M1A2's operating in Iraq.