AR-556 MPR 450 Bushmaster 18.625"

• 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.

Specifications:

• 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