TacFire Bolt Carrier Group Features The TacFire Bolt Carrier Group is purpose built for .45 ACP AR platform rifles fitting S&W M&P pattern guns that run this chambering. The nitride finish applied to the carrier provides a hard low-friction surface that helps the action cycle smoothly while resisting corrosion from heat moisture and powder residue. This type of finish is favored in AR builds because it holds up to repeated cycling better than many standard finishes reducing the need for frequent heavy lubrication. The black color gives the BCG a clean factory-correct look inside the upper receiver. Built specifically for the .45 ACP cartridge this bolt carrier group is sized and configured to handle the unique dimensions of pistol caliber AR actions rather than standard 5.56 or .223 components. Installing a quality BCG like this one is a common step when building upgrading or repairing a .45 ACP AR platform rifle. TacFire s focus on AR components means this BCG is designed to be a reliable drop-in option for compatible S&W M&P style platforms. For shooters maintaining a .45 ACP build this bolt carrier group offers a straightforward way to keep the action running reliably. TacFire Bolt Carrier Group Specifications Manufacturer: TacFire Model: Bolt Carrier Group Caliber: .45 ACP Compatible Hosts: S&W M&P Color: Black Firearm Type: AR Platform Finish: Nitride Available At: GrabAGun