Ruger 8522 AR-556 MPR 450 Bushmaster 18.63" 5+1 Black Hard Coat Anodized Adj Magpul MOE SL Stock

Ruger 8522:

RUGER® 
AR-556® MPR .450 BUSHMASTER
• Built to support .450 bushmaster ammunition with a high-strength superalloy bolt with tapered lugs & an enlarged ejection port   
• Carbine-length gas system   
• Ruger® Elite 452™ AR-Trigger (2-stage/4.5 lb. pull)   
• Full-strength hammer spring for consistent primer ignition   
• Lightweight hammer enables a 30% faster lock time over standard MSR triggers   
• Threaded muzzle  
• Ruger® muzzle brake with radial port design   
• 1:16 RH twist   
• Free-floating 15" slim handguard with full-length Picatinny top rail & M-LOK® accessory slots along the 3:00 6:00 & 9:00 positions with additional slots on the angled faces near the muzzle    
• Magpul® MOE® black grip & MOE SL™ collapsible black buttstock   
• MIL-SPEC buffer tube   
• Includes 5-round metal box mag   
• OAL: 35.6" - 38.9"   
• Wt.: 7.4 lbs.   

AR-556®
SHARED FEATURES
• Gas operated semi-auto   
• Type III hardcoat anodized 7075-T6 aluminum flat top upper receiver with forward assist dust cover & brass deflector   
• 9310 alloy steel bolt shot peened & pressure tested    
• Matte black oxide finished chrome-plated bolt carrier & gas key (staked)   
• Matte black nitrided cold hammer-forged chrome-moly steel barrel with ultra-precise 5rd rifling   
• Enlarged trigger guard