Porting reduces recoil and muzzle jump; Creates tight and dense patterns; Made in the USA from aircraft quality 17-4 stainless steel then heat treated to the optimum level for maximum durability; Coated in a titanium, non-reflective bronze finish; Heat treated for maximum durability and coated in a titanium, non-reflective bronze finish; 3-Phase Constriction equates to more downrange energy; Made in the USA