Heckler & Koch MR556 A4 5.56 NATO 16.5" 10+1 Rifle, Black - 81000828

The HK MR556 A4 is a semi-automatic AR-platform rifle chambered in 5.56 NATO with a 16.5" threaded barrel and 10+1 capacity. Features include an M-LOK free-float handguard, HK416 six-position collapsible stock, ambidextrous controls, short-stroke gas piston system, and Picatinny rail for optics mounting. The rifle weighs 7.67 lbs and has an overall length range of 33.25" to 36.5" depending on stock position.