18x1 To 1/2x28 Thread Adapter & Thread Protector For 9mm Cz Scorpion

18X1 to 1/2x28 Thread adapter and Larger Thread protector (.90" OD) for 9mm CZ Scorpion EVO 3 S1 pistol. This adapter will enable the use of a more common threaded muzzle brake, compensator or suppressor. Both made of machined steel, finished in durable black oxide.