In 2010,the US Marine Corps adopted the Heckler & koch M27 as its new Infantry Automatic Rifle(IAR).The rifle is named for the 1st Marine Division, 2nd Battalion, 7th Regiment, that tested the rifles and IAR (infantry automatic rifle) concept for more than a decade. Replacing the M249 for rifles quads, the M27 was once declared, The most tested weapon in the history of the Marine Corps. The M27 has proven itself again and again, from the test ranges at Twenty nine Palms to the Global War on Terror and beyond. With its precision, durability, and reliability, the M27 expanded beyond the initial role of IAR. The M27 is fielded today as an IAR, precision rifle, general infantry rifle and most recently as a short-barreled upper receiver Reconnaissance Weapons Kit(RWK). Only 1,000 MR27 Special Edition rifles will be offered. Includes 10rd magazine, hard case and Trijicon ACOG 3.5x30mm.