Franklin Armory Bolt Carrier Group Features The Franklin Armory Bolt Carrier Group is built for the 5.56 x 45mm cartridge one of the most widely used chamberings in the AR-15 platform and is machined and finished to work reliably within that system. Finished in Black the bolt carrier group matches the standard appearance of most AR-15 builds while offering the corrosion resistance expected from a quality finish. At 9 inches overall the group is sized to the dimensions required for proper function within a mil-spec or compatible AR-15 upper receiver. Replacing a worn or damaged bolt carrier group with a quality part like this helps maintain reliable cycling and extraction in a rifle that sees regular use. Because this is manufactured by Franklin Armory a company known for producing precision AR-15 components owners can expect consistent fit and function when installing it into a compatible upper. A bolt carrier group is one of the most critical components in an AR-15 s operating system directly affecting reliability so sourcing a quality replacement matters for anyone maintaining or building a rifle. At 0.75 pounds this part ships light and installs using standard AR-15 maintenance procedures familiar to most owners. For AR-15 builders and owners needing a dependable bolt carrier group this Franklin Armory part is available for sale at GrabAGun. Franklin Armory Bolt Carrier Group Specifications Manufacturer: Franklin Armory Model: Bolt Carrier Group Caliber: 5.56 x 45mm Finish: Black Overall Length: 9 Weight: 0.75 lbs Available At: GrabAGun