Battle: Los Angeles is a 2011 science fiction war film starring Aaron Eckhart as a Marine staff sergeant who leads a platoon in defending the city of Los Angeles from an alien invasion and to save a group of survivors before a massive attack begins over the city.
NOTE: All images are screencaps taken from the film's first trailer unless otherwise noted
The following weapons were used in the film Battle: Los Angeles:
Staff Sergeant Michael Nantz (Aaron Eckhart) and another Marine are seen firing their Beretta 92s at the aliens during the final battle
Colt M4A1
The Colt M4A1 carbine is one of the main weapons utilized by the U.S. Armed Forces in Battle: Los Angeles, seen in the hands of members of the 2nd Battalion 5th Marines and the 40th Infantry Division. The M4's appear to be fitted with ACOG scopes, RIS foregrips, Surefire Universal weaponlights, and most interestingly, AN/PEQ-15 laser designators; an improved, compact version of the AN/PEQ-2 system first employed in the early 2000's.
M16A4
The M16A4 rifle MWS (Modular Weapons System) with RAS Rail System is utilized by U.S. Marines.
Colt M4A1 with M203 Grenade Launcher
M203 grenade launcher 40mm grenade launcher is visible on various M4A1 carbines used by U.S. Marines.
FN M249 SAW
The M249 SAW used by the US Marines in the film's trailer, fitted with an ACOG scope.
M240D Machine Gun
The mounted version of M240 machine guns machine gun is visible on the ramp of at least one of the U.S.M.C. CH-46 Sea Knights that appears in a 4 seconds teaser released in July 2010. Another M240 apears to be monted on top of the comandeered LAV25, though it is never seen clearly
Also, the coaxial-mounted version M240C is utilized by M1A2 Abrams MBT.
Several Marines could be seen mounting a Browning M3 at the side of a UH-1N Huey helicopter at MCAS Camp Pendleton.
M136 AT4
One of the Marines is seen carrying the M136 AT4 in the film's trailer after aquiring it from the wreckage of the FOB. Technical Sergeant Adriana Santos (Michelle Rodriguez) uses it in the end battle to destroy an alien drone. The movie seems to the treat the AT4 as a guided weapon, judging by the squealing lock-on tone heard before firing.
M242 Bushmaster chaingun
The 25mm M242 Bushmaster chaingun is the main gun of the Marines' LAV-25 armored personnel carriers seen in the film's trailer.
M67 hand grenade
What appear to be M67 hand grenades are used by the Marines thoughout the movie to great effect.
M18 smoke grenade
M18 smoke grenades are used for signaling in the movie. They appear to give off white-grey smoke.
GE M134 Minigun
The GE M134 Minigun is briefly seen Mounted on a Humvee when the marines are at F.O.B at Santa Monica airport.