CMMG RESOLUTEA(R) MK4 300BLK ASSEMBLED UPPER RECEIVER W/P&W BRAKE The carbine upper that keeps it simple. Chambered in 300BLK, this RESOLUTE upper group’s 14.5″ barrel comes with the ZEROED SVD muzzle brake pinned & welded to the muzzle. This is the perfect choice when you want to go as short as possible while still meeting overall length requirements for rifle barrels, so no NFA rules or SBR registration. This upper group does NOT include BCG or charging handle. SPECS Platform: Mk4 Caliber: 300BLK Operating System: Direct Impingement Barrel Length: 14.5″ Barrel Twist: 1:7 Barrel Cont Mfg: Cmmg
Resolute(R) Mk4 5.56x45mm Nato Assembled Upper Receiver - Resolute Mk4 5.56 Nato Assembled Upper Rcvr 16.1" Bbl Black Original price was: $595.38.$459.99Current price is: $459.99. 
Cobalt Kinetics CK-Pro Upper Receiver Group 5.56 NATO 13.7in Black Cerakote CKPROURG556137BLK Original price was: $1,429.67.$1,277.98Current price is: $1,277.98. 
Resolute(R) Mk4 300 Blackout Assembled Upper Receiver W/P&W Brake – Resolute Mk4 300blk Assembl Upper 14.5””bbl W/P&W Brake Blk
Original price was: $595.38.$457.99Current price is: $457.99.
