AR-15 Bull Barrel Thread Protector Nut for 1/2"x28 Muzzle Threading, Stainless Steel SKU: BTPR03S
Protects your Barrels fore end threading when you have to remove your AR-15's Muzzle Brake. Fits Standard AR-15 Barrel threading 1/2"x28. Outer width is for Bull type barrel thickness, not standard barrels. Outside textured for easy hand tightening.
"Last photo is for example only and shows standard barrel and protector."