Lower receiver is fitted with Magpul MOE grip and MOE SL collapsible buttstock on a Mil-Spec buffer tube; Handguard is free-floated for accuracy and the slim, 15″ length provides enhanced ergonomics; Bolt is mil-spec 9310 and is machined, shot peened and proof tested for strength and durability; Ruger Elite 452 AR-Trigger is a two-stage trigger that offers a smooth, crisp, 4.5 pound trigger pull; Magpul M-LOK accessory attachment slots along the 3, 6 and 9 positions with additional slots on the angled faces near the muzzle; Ruger muzzle brake is a radial port design that significantly reduces felt recoil and muzzle movement. The threaded barrel allows for standard muzzle accessories to be installed; Cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise rifling provides exceptional accuracy, longevity and easy cleaning; Bolt carrier and gas key have chrome-plated inside diameters to provide exceptional resistance to hot gases. The gas key is staked so that it will not loosen after extensive firing; Pistol-length gas system provides smoother operation and reduces felt recoil; Includes (1) 5-round magazine