AR-15/M16 BARREL NUT WRENCH The Precision Reflex, Inc. AR-15/M16 Barrel Nut Wrench is a heavy-duty tool designed to provide ample leverage for the installation and removal of barrel nuts on AR-15 and M16 rifles. Constructed from 3/8" thick 1018 steel with a black oxide finish, this wrench ensures durability and longevity. It features cutouts for both 3/8" and A 1/2" drive tools, allowing compatibility with breaker bars, socket wrenches, or torque wrenches for precise torque application. The built-in 10" handle offers convenience, and additional holes between the pins assist with proper gas tube alignment during assembly. Key Features: Heavy-Duty Co Mfg: Precision Reflex SPECS: 1018 steel, black oxide finish. AR-15 fits mil-spec AR-15/M16/M4 and clones.