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5th Battalion, 11th Marines (5/11) was a High Mobility Artillery Rocket System battalion consisting of four Firing Batteries and a Headquarters Battery. The battalion is stationed at Marine Corps Base Camp Pendleton, California. It is the first active duty HIMARS Unit in the 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 M320 grenade launcher in fireteams, M224A1 60 mm mortar in companies, and M252 81 mm mortar in battalions.
In 1983, the US Marine Corps adopted the M16A2 rifle, and the US Army adopted it in 1986. The M16A2 fires the improved 5.56×45mm (M855/SS109) cartridge and has a newer adjustable rear sight, case deflector, heavy barrel, improved handguard, pistol grip, and buttstock, as well as a semi-auto and three-round burst fire selector. [21]
The most notable adopter of the AN/PEQ-16 as the standard infantry LAM was the United States Marine Corps (USMC) with the initial introduction of the M27 IAR to replace all M249 SAWs in USMC service, and then in 2017 the decision by the USMC Commandant for all Marine infantryman to field the M27.
5.56×45mm NATO: Army, Marine Corps: M16A4 still in use with some Marine Corps units. HK416: Assault rifle: Heckler & Koch: 5.56×45mm NATO: USSOCOM: Piston operated rifle, ergonomics and controls based on the M16/M4 platform. M27 IAR: Assault rifle, Squad automatic weapon: Heckler & Koch: 5.56×45mm NATO: Marine Corps
The United States Marine Corps Designated Marksman Rifle (DMR, NSN 1005-01-458-6235; more formally the United States Rifle, Caliber 7.62 mm, M14, DMR) is a semi-automatic, gas-operated rifle chambered for the 7.62×51mm NATO cartridge. It is a modified version of the M14 rifle formerly used by the United States Marine Corps.
The M27 Infantry Automatic Rifle (IAR) is a 5.56mm, select-fire assault rifle / squad automatic weapon developed from the HK416 by Heckler & Koch.It is used by the United States Marine Corps (USMC) and was originally intended for automatic riflemen, [6] but now is issued to all infantry riflemen as a replacement for the M4 carbine.
The Squad Designated Marksman Rifle (SDM-R [1]) is an American designated marksman rifle used by the United States Army.It is essentially a heavily modified M16 rifle designed to provide U.S. Army designated marksmen greater accuracy and firepower at longer ranges, increasing an infantry squad's effective range to up to 600 meters.