One of a Kind Complete A1 Carry Handle Machined from billet aluminum, the Brownells A1 Carry Handle offers the robust design of the A1 Rear Sight, with the flexibility of a detachable carry handle. The A1 carry handle attaches cleanly to any flat top, M4 type upper receiver. Large flat knobs allow for simple, toolless attachment and removal. The machined carry handle is designed and manufactured by CNC Guns, with Brownells now offering the completed assembly for the first time. Rear sight is a standard A1 assembly, that adjusts and locks in place just like the original. Utilizing the A1 rear sight ensures your zero won't be lost if the rifle is bumped or handled roughly. Mfg: Brownells