RUG AR-556 MPR 450BUSH 18.63 TB 15 MLOK 5RD

Caliber: 450 Bushmaster - 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 - Also includes: One Magazine - 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.