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

AR 9mm Barrel Thread Protector Nut for 1/2"x36 Muzzle Threading, 0.712", Black  SKU:  BTPR04

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.  Outer width is for standard barrels.  Outside textured for easy hand tightening.   Carbon Steel.