For a tough and versatile tool that gets the job done, use the Real Avid Armorer's Master Wrench. This master wrench sits squarely for a no-slip fit on stubborn barrel nuts, castle nuts, muzzle brakes, or fixed stock receiver extensions, and the torque wrench attachment is optimally positioned to provide consistent torque for all nuts. The interchangeable hammer heads allow for versatile use. Real Avid Armorer's Master Wrench Black - Shooting Supplies And Accessories at Academy Sports
