Armorer's wrenches are a critical tools for any gun tech looking to fully disassemble their AR-15/M4/M16 style rifles. The armorer's wrench has special sockets designed to take the barrel nut off of the receiver, allowing a tech to change outer barrels and rail systems. The other portion of the wrench is designed to tighten or loosen the nut holding the buffer tube on. This wrench can also be used to remove flash hiders as well. Made from powder-coated 4140 steel this wrench is extremely durable.