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This is a list of weapons used by the United States Marine Corps:
The basic infantry weapon of the United States Marine Corps is the M27 Infantry Automatic Rifle. Suppressive fire is provided by the M240B machine gun, at the squad and company levels respectively. In addition, indirect fire is provided by the M203 grenade launcher in fireteams, M224a1 60 mm mortar in companies, and M252 81 mm mortar in battalions. The M2 .50 caliber heavy machine gun and MK19 automatic grenade launcher (40 mm) are available for use by dismounted infantry, though they are more commonly vehicle-mounted. Precision fire is provided by the M110 Semi-Automatic Sniper System and M40A3, A5, A6 bolt-action sniper rifle. 
The Marine Corps uses a variety of direct-fire rockets and missiles to provide infantry with an offensive and defensive anti-armor capability. The SMAW and AT4 are unguided rockets that can destroy armor and fixed defenses (e.g. bunkers) at ranges up to 500 meters. The FGM-148 Javelin and BGM-71 TOW are anti-tank guided missiles; both can utilize top-attack profiles to avoid heavy frontal armor and are heavy missiles effective past 2,000 meters that give infantry an offensive capability against armor.
Marines are capable of deploying non-lethal weaponry as the situation dictates. Part of a Marine Expeditionary Unit earning the Special Operations Capable designator requires a company-sized unit capable of riot control.
Some older weapons are used for ceremonial purposes, such as the Silent Drill Platoon's M1 Garands, or the use of the M101 howitzer for gun salutes.
- Beretta M9
- Beretta M9A1
- Glock 19M - Adopted in February 2015 for use by MARSOC
- M45A1 CQBP - Modified M1911A1, for use by MEU(SOC) and MARSOC. Still in use by Recon Battalions and Security and Emergency Services Battalions.
- M17 - Standard issue pistol since 2019
- M18 - Standard issue pistol since 2019
Automatic Rifles and Carbines
A U.S. Marine armed with an M16A4 rifle and ITL MARS sight in 2004.
A U.S. Marine armed with an M27 IAR affixed with ACOG Squad Day Optic.
Designated Marksman Rifles
- Mk 13 mod 7 - .300 Winchester Magnum chambered sniper rifle built on Accuracy International Chassis System with Remington 700 long action.
- Mk 11 Mod 0 - 7.62×51mm sniper rifle based on the M16 direct impingement gas system.
- M110 Semi-Automatic Sniper System - Improved version of the Mk 11, replacing the M39 and Mk 11.
- M40 rifle - M40A3, M40A5 and M40A6 variants in use as sniper rifles.
- Barrett M82 - in use as the M82A3 and M107 variants. The M82A3 being an upgraded M82A1A, and the M107 being a variant made in response to requirements issued for an anti-materiel rifle.
- M21 - modified M14 rifle
Vehicle-mounted M2 .50 caliber machine guns in May 2005.
- M2HB - heavy machine gun chambered in .50 BMG used primarily as a secondary weapon on the M1 Abrams and other vehicles.
- M240G - 7.62×51mm medium machine gun used by infantry and in the M1 Abrams, light vehicles, and helicopters.
- Mk48 Mod 1 - 7.62×51mm light machine gun, used by US MARSOC.
- M249E4 - 5.56×45mm light machine gun, infantry support weapon. Not replaced, but being supplanted by the M27 IAR.
A Video of U.S. Marines training with the M32A1
Shoulder-fired Missile and Rocket Launchers
with AGM-114 Hellfire missiles and Hydra 70 rockets
Marine emplaces a claymore mine
Marines with MARSOC, Force Reconnaissance, and MEU(SOC)s occasionally use specialized weapons that the rest of the fleet does not. In addition, some weapons are tested and evaluated in select units before acceptance and large-scale adoption. In a few cases, older weapons are brought out of retirement for limited use.
- Bladed Weapons
- Rifles, Carbines, & Muskets
- Submachine guns
M1A1 Thompson submachine gun
- Machine guns
- Explosives & Launchers
The U.S. Marine Corps still uses the M101, although for ceremonial purposes only. Here, U.S. Marines are seen firing off a M101 during a ceremony in March 2005.