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Former SAW gunners initially did not like the M27, but appreciated it as time went on.

1st Battalion 3rd Marines were deployed to Afghanistan in April 2011 with 84 IARs. The simpler gas-piston rifle system reduces the amount of time it takes to resolve malfunctions on the IAR compared with the M249 light machine gun.”ĬLICK HERE for full-screen M27 Photo by Heckler & Koch.Īs deployed, early versions of the IAR have done well in combat: “The IAR was initially fielded in December 2010. The handguard has four MIL-STD-1913 Picatinny rails for use with accessories and optics. It features a gas-operated, short-stroke piston action with a rotating bolt and a free-floating barrel. (Source: .)Īccording to Wikipedia: “The M27 is a lightweight, magazine-fed 5.56mm, select-fire weapon based on the Heckler & Koch HK416. In December 2017, the Marine Corps revealed a decision to equip every Marine in an infantry squad with the M27, so this is a major change.

Marine Corps initially planned to purchase 6,500 M27s to replace a portion of the M249 light machine guns employed by automatic riflemen within Infantry and Light Armored Reconnaissance Battalions. The H&K model selected is the M27 Infantry Automatic Rifle, a derivative of the famous H&K 416″. GunsAmerica reports: “H&K has officially received the contract for the USMC to replace the M4 carbines. The adoption of the M27 was announced at SHOT Show 2018. This change-over has been in the works for some time, but the “protest period” has concluded, so now it is official. The HK416 has been used by the German Army and some USA Special Operations units. Designated the M27 IAR (Infantry Automatic Rifle), the new rifle is based on Heckler & Koch’s HK416, which looks like an AR, but runs with an internal gas piston system. Marine Corps will be adopting a new rifle to replace the M4 select-fire carbine. February 2nd, 2018 No More M4 - USMC Adopts H&K M27 Infantry Automatic Rifle