This Vltor A5 PCC buffer is a high quality replacement component that will provide excellent fit and reliable function in your AR series pistol caliber carbine. Designed specifically for pistol calibers, which require a longer buffer to increase cyclical rate of the bolt carrier.Notes: This buffer will not fit in a regular carbine or rifle system, it is designed specifically for use with the A5 recoil system on a PCC Carbine - attempting to use this buffer in a standard rifle or will result in damage to the firearm and potential injury to the operator.Made In United States of America