Ruger AR-556 MPR Collapsible Stock 450 Bushmaster 18.63" 5-Round Rifle

The AR-556® MPR features the Ruger® Elite 452™ AR-trigger. This two-stage trigger 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.

• Black synthetic collapsible stock
• Cold hammer-forged 4140 chrome-moly steel barrel with ultra-precise rifling 
• 11/16"-24 threaded barrel allows for standard muzzle accessories to be installed
• Aerospace-grade 7075-T6 aluminum forging flattop upper receiver includes forward assist, dust cover, brass deflector and Type III hard coat anodized finish
• Upper receiver includes enlarged window for easy ejection, forward assist, dust cover and brass deflector
• Lower receiver fitted with Magpul® MOE® grip and MOE SL™ collapsible buttstock on mil-spec buffer tube
• Free-floating handguard for accuracy and slim 15" length provides enhanced ergonomics and support
• CNC-machined from mil-spec forging and Type III hard coat anodized for maximum durability
• Bolt machined from high-strength super alloy and engineered with tapered lugs to support large case head of 450 Bushmaster ammo
• Carbine-length gas system provides the most reliable function with 450 Bushmaster ammo
• Magpul M-LOK® accessory attachment slots along 3:00, 6:00 and 9:00 positions with additional slots on angled faces near muzzle
• Chrome-plated bolt carrier inside diameter and chrome-plated gas key inside diameter provide exceptional resistance to hot gases
• Ruger muzzle brake radial port design significantly reduces felt recoil and muzzle movement
• One 5-round metal box magazine included
• Handguard: Free-float M-LOK
• Capacity: 5
• Twist: 1:16" RH
• Grooves: 5
• Length of pull: 11.1 - 14.4"
• Dimensions: 35.6 - 38.9"L x 7.3"H
• Weight: 7 lbs. 6 oz.
• Made in USA