FailZero AR10 Bolt Carrier Group Features The FailZero AR10 Bolt Carrier Group ships fully assembled and ready to drop into most mil-spec AR10 upper receivers built to the DPMS pattern eliminating the need for separate parts sourcing or assembly. Nickel Boron treated components include the bolt and extractor bolt carrier extractor cam pin carrier key and firing pin covering every critical wear point in the action. This EXO Nickel Boron coating provides permanent dry lubricity meaning the action runs smoother with reduced friction even without heavy lubrication. Over time this translates to improved reliability and reduced wear compared to a standard phosphate finished carrier. The carrier wears a black topcoat over the Nickel Boron coating underneath giving it a non-reflective tactical appearance ideal for low visibility use. As the carrier sees use wear areas such as ramps rails and carrier ends will naturally expose the Nickel Boron coating beneath while non-wear areas like the dust cover region retain the black finish. This is an expected and normal part of the coating s design rather than a defect. Compatible with .308 Win and 6.5 Creedmoor pattern DPMS uppers the FailZero AR10 Bolt Carrier Group gives AR10 shooters a proven low maintenance upgrade for improved long term reliability. Fail Zero AR10 Bolt Carrier Group Specifications Manufacturer: Fail Zero Model: AR10 Bolt Carrier Group Color: Black Material: Steel Description: No Hammer Compatible Hosts: DPMS Pattern AR10 6.5 Creedmoor Caliber: .308 Win Available At: GrabAGun