The M27 Automatic Rifle is the standard squad automatic weapon for all US Marines.

The M27 Infantry Automatic Rifle (IAR) is a select-fire weapon that chambers the NATO-standard 5.56x45mm cartridge. It is derived from the Heckler & Koch HK416 and is currently in service with the United States Marine Corps.

The M27 is often mistaken as just an upgraded version of the FN Minimi or even its modified version, but that isn’t exactly correct. The M27 is built explicitly for and issued to infantry soldiers (hence “Infantry” in its official designation) within an Infantry Battalion Task Force. With that being said, let’s take a look at everything you need to know about the M27 Infantry Automatic Rifle.

Introduction to the M27 Infantry Automatic Rifle

The M27 Infantry Automatic Rifle (IAR) is the standard squad automatic weapon for all United States Marine Corps. It is the supposed successor to the M249 Squad Automatic Weapon, providing soldiers with a more compact, lighter, and improved version of the standard general-purpose machine gun that can be useful in a wider variety of scenarios.