TACPOOL 9mm Barrel Thread Protector Nut for 1/2"x36 Muzzle Threading, 0.712"

TACPOOL offers replacement components for the AR-15 that are made to strict military specifications. This high quality components will provide excellent fit and reliable function in your AR series rifle and are perfect for upgrading existing components or replacing worn or broken parts. 9mm Barrel Thread Protector Nut for 1/2"x36 Muzzle Threading, 0.712" Protects your 9mm 0.712" Barrels fore end threading when you have to remove your Muzzle Brake.  Fits Standard 9mm Barrel threading 1/2"x36.  Fits Barrel threading 1/2"x28. Outer Diam: 0.712" Outer width is for standard barrels.  Outside textured for easy hand tightening.