AR-15 and M4 Armorer's combo wrench tool. Made of all steel construction and compatible with most M16, M4, and AR-style rifles. Durable universal tool for both M16 fixed stock and M4 collapsing stock variants of the AR-15 platform. Allows the installation/removal of barrel nuts, muzzle devices, and buttstocks. Features: Heavy-duty multi-tool CAR stock with 3-point castle nut/locking ring Install/disassemble nuts, compensators and tubes Removal/installation of AR-15 barrels Receiver tube stock nut wrench A1/A2 flash hider slot/receiver extensions