Presma AR-15 Bull Barrel Thread Protector Nut for 1/2inx28tpi Muzzle Threading Black Carbon Steel

Presma AR-15 Bull Barrel Thread Protector Nut for 1/2inx28tpi Muzzle Threading Black Carbon Steel. Outside textured for easy hand tightening. Specifications for Presma AR Barrel Thread Protector Nut: Manufacturer: Presma Condition: New Fabric/Material: Stainless Steel Quantity: 1 Package Contents: Presma AR Barrel Thread Protector Nut What firearm models does the manufacturer say Presma AR Barrel Thread Protector Nut is compatible with? The manufacturer says that Presma AR Barrel Thread Protector Nut is compatible with AR-15 AR-10Presma BTPR03: AR-15 Bull Barrel Thread Protector Nut for 1/2inx28tpi Muzzle Threading Black Carbon Steel