TacFire Bolt Carrier Group Features The TacFire Bolt Carrier Group is finished in nickel boron a coating known for its low-friction surface and resistance to carbon fouling. That slicker surface helps the bolt carrier cycle more smoothly through firing cycles which can translate into more reliable function over extended use. Because carbon has a harder time adhering to the nickel boron finish cleaning the bolt carrier group after a range session takes less time and effort than with a standard finish. This BCG is chambered specifically for .300 AAC Blackout matching the bolt geometry and headspace to that cartridge. A properly matched bolt carrier group is essential to reliable function in any AR platform rifle and sourcing one built specifically for .300 AAC Blackout takes the guesswork out of that match. The nickel boron finish also adds a layer of corrosion resistance compared to an untreated steel surface helping the component hold up over time. Builders assembling a .300 AAC Blackout upper or owners replacing a worn factory BCG both benefit from the combination of smooth cycling and easier upkeep. The TacFire Bolt Carrier Group is a straightforward way to improve the day to day reliability of a .300 AAC Blackout rifle. TacFire Bolt Carrier Group Specifications Manufacturer: TacFire Category: Bolts and Pistons Caliber: .300 AAC Blackout Finish: Nickel Boron Available At: GrabAGun