Specialized, precise-fitment armorer's crowfoot wrench, fits A 1/2" receiver torque wrench head - Purposefully designed to fit A2 fixed stock receiver extension and 5/8" muzzle devices - Titanium coated stainless steel to confidently apply desired torque while minimizing marring on gun parts - Tight tolerances for solid grip and no-slip tool control. Mfg: Real Avid