CZ Scorpion Evo / 3+ compensator V10 [1/2x28 UNF or M18x1]Professional compensator for better manipulation and recoil handling. Full list of compatible CZ models is below. Specification original Ascalon product made of vanadium steel, Arcor finish made in Czech republic thread 1 2" x 28 UNF or M18 x 1 [with adapter] weight: 82 g [2. 9 oz] outer diameter: 26 mm length: 53 mm It includes crush washer and carbon deposit scraper in the package for both ports and the bore channel. It will help to keep your CZ run