Presma AR-15 Barrel Thread Protector Nut for 5/8x32tpi Muzzle Threading Black Carbon Steel

Presma AR-15 Barrel Thread Protector Nut for 5/8x32tpi Muzzle Threading Black Carbon Steel. Outside textured for easy hand tightening. Specifications for Presma AR Barrel Thread Protector Nut: Manufacturer: Presma 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 BTPR04: AR-15 Barrel Thread Protector Nut for 5/8x32tpi Muzzle Threading Black Carbon Steel