The A2 Flash Hider offers versatile compatibility with both 9mm and 5.56x45 calibers featuring a durable nitride black finish and standard 1/2"x28 threading.A2 9mm/5.56x45 Compatible Flash Hider1/2"x28 thread pitch for standard compatibilityNitride coating for enhanced durability and corrosion resistanceBlack finish for tactical appearanceDual caliber design for versatile applicationsIdeal for shooters seeking a reliable flash suppression solution compatible with multiple popular calibers combining proven A2 design with modern coating technology.