LanTac USA LLC SF 15 Patrol, Complete Upper Receiver, 300 Blackout, 14.5 Barrel, Fits AR-15, Anodized Finish, Black 01-FA-300-PATROL-UPR The LA-SF15 PATROL URG (Upper Receiver Group) is built to the highest quality standards and assembled by a skilled team of armorers. Each URG undergoes a shot test at Lantac's facility and comes with a lifetime warranty against defects. The LA-SF15 URG features their enhanced forged receiver with a radiused cam pin recess, which works with their patented CP-R360 Domed Head Cam Pin to reduce wear and friction. The E-BCG Bolt Carrier Group has larger, forward-facing gas ports that vent gas away from the shooter, resulting in a smoother operation, less recoil, and improved accuracy thanks to the carrier's flared tail. Each URG also includes Lantac's patented Dragon Muzzle Brake for maximum control.