MR762A1 Rifle 7.62mm NATO 16.5 Inch Barrel Black Finish Adjustable Polymer Stock 20 Round. Gas operated, short stroke piston. Two stage trigger. Five-position adjustable stock. Cold hammer forged 16.5 inch barrel with a 1:12 inch right hand twist rate. Ergonomic pistol grip; mechanical sights. Free floating quad-rail handguard system with Mil-Std 1913 picatinny style rails. Polymer box magazine.