AR-556 MPR .450 Bushmaster 18.6in 30rd Black

The Ruger 8522 AR-556 MPR .450 Bushmaster 18.6in 5rd Black. Specifications: * Stock: Black Synthetic, Collapsible * Handguard: Free-Float M-LOK * Sights: None * Barrel Length: 18.63" * Thread Pattern: 11/16"-24 * Twist: 1:16" RH * Capacity: 5 * Finish: Type III Hard Coat Anodized * Height: 7.30" * Weight: 7.4 lb. * Overall Length: 35.60" - 38.90" * Length of Pull: 11.10" - 14.40" * Grooves: 5 Features: * Lower receiver is fitted with Magpul MOE grip and MOE SL collapsible buttstock on the Mil-Spec buffer tube. * Handguard is free-floating for accuracy and the slim, 15" length provides enhanced ergonomics and support. * Flattop upper receiver includes an enlarged window for easy ejection as well as forward assist, dust cover and brass deflector. CNC-machined from Mil-Spec forging and Type III hard coat anodized for maximum durability. * Bolt is machined from high-strength superalloy, more than 50% stronger than traditional MSR bolt materials, and engineered with tapered lugs to support the large case head of .450 Bushmaster ammunition. * The Ruger Elite 452 AR-Trigger is a two-stage trigger that offers a smooth, crisp, 4.5 pound trigger pull. It features a full-strength hammer spring for consistent primer ignition and a lightweight hammer that enables a 30% faster lock time over standard MSR triggers. * Carbine-length gas system provides the most reliable function with .450 Bushmaster ammunition. * Magpul M-LOK accessory attachment slots along the 3:00, 6:00 and 9:00 positions with additional slots on the angled faces near the muzzle. * Cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise 5R rifling and black nitrided finish provides exceptional accuracy, longevity and easy cleaning. The 1:16" twist rate maximizes accuracy with bullets ranging from 170 to 260 grains. * Chrome-plated bolt carrier inside diameter and chrome-plated gas key inside diameter provide exceptional resistance to hot gases. The gas key is staked so that it will not loosen after extensive firing. * Ruger muzzle brake is a radial port design that significantly reduces felt recoil and muzzle movement. The 11/16"-24 threaded barrel allows for standard muzzle accessories to be installed. * Also includes: One, 5-round metal box magazine.