Sons of Liberty Gun Works L89 AR-15 8.5 inch .300BLK Upper Receiver Group

Sons of Liberty Gun Works L89 AR-15 8.5 inch .300BLK Upper Receiver Group. These upper receiver groups are built using a forged upper receiver, Liberty Fighting Barrels with SOLGW 4140 gas block and nitrided gas tube. The uppers feature 7-sided MLOK slots with integral QDs at the barrel nut on the left and right sides. The L89 uses the Drivelock barrel nut system with anti-rotation tabs and an internal dowel pin between the upper and rail to ensure a solid lockup with minimal POI shifts for attached lasers or other accessories. They are test fired before leaving the shop. Specifications: Caliber .300 AAC Blackout; Barrel Length 8.5 in; Barrel Profile Medium; Barrel Twist Rate 1-7; Finish Anodized; Color Black; Fabric/Material 416 Stainless Steel; Gun Make AR Platform; Gun Model AR-15; Bolt Carrier Group Included: No; Charging Handle Included: No; Package Contents: Sons of Liberty Gun Works L89 AR-15 8.5 inch .300BLK Upper Receiver Group