Noveske Bolt Carrier Features The Noveske Bolt Carrier Group uses a full auto profile design which adds mass and bearing surface compared to a semi auto only carrier helping the action cycle more smoothly and consistently across a range of ammunition and gas settings. The chrome lined bolt bore reduces friction and resists carbon buildup inside the carrier making cleaning easier after extended range sessions. A chrome lined gas key further protects against fouling at the point where gas enters the carrier which is critical for reliable cycling over the life of the rifle. The phosphate finish gives the carrier a durable corrosion resistant surface that has long been a mil spec standard for AR-15 bolt carrier groups. Properly staked during assembly the gas key resists loosening from the repeated shock of firing a common failure point on lower quality carriers. The complete group ships with the firing pin retaining pin and cam pin already installed so it drops directly into a complete upper without needing to source additional small parts. Being Noveske marked this carrier reflects the same quality control standards the company applies to its complete rifles and uppers. For AR-15 owners looking to upgrade or replace a bolt carrier group with a proven full auto rated unit the Noveske Bolt Carrier Group is available for sale at GrabAGun. Noveske Bolt Carrier Specifications Manufacturer: Noveske Model: Bolt Carrier Type: Bolt Carrier Color: Black Finish: Phosphate Compatible Hosts: AR-15 Includes: Firing Pin Retaining Pin Cam Pin Available At: GrabAGun