Rock River Arms LAR-15M | 5.56 NATO | 18" Barrel Looking for a dependable AR-15 with premium features and proven performance? Check out this Rock River Arms LAR-15M chambered in 5.56 NATO. Chambered in 5.56 NATO / .223 Remington 18-inch barrel for enhanced velocity and accuracy Free-float M-LOK handguard Red dot optic installed Adjustable stock Muzzle brake installed 10-round magazine included Rock River Arms quality and reliability Overall great condition with only minor cosmetic wear (pictured) Perfect for the range, target shooting, predator hunting, or anyone looking for a quality AR platform that's ready to perform.