KAK Industry A1 Flash Hider Features The KAK Industry A1 Flash Hider recreates the classic retro profile seen on early AR-15 and M16 pattern rifles giving a build an authentic period correct look. Heat treating the steel improves durability under the heat and pressure generated at the muzzle during firing. A Phosphate coating is applied over the Black finish to add a layer of corrosion resistance for long term use. Milled flats on the body allow for easy installation and removal with a standard wrench. Threaded 1/2x28 this flash hider fits the overwhelming majority of 5.56 NATO AR-15 barrels without needing an adapter. At just 1.750 inches overall it adds minimal length to the muzzle while still providing genuine flash suppression. A crush washer is not included so builders will want to have one on hand for proper timing during installation. KAK Industry built this flash hider to give budget conscious AR-15 builders an affordable American made option for completing a retro style rifle. KAK Industry A1 Flash Hider Specifications Manufacturer: KAK Industry Model: A1 Flash Hider Compatible Hosts: AR-15 Caliber: 5.56 NATO Color: Black Finish: Phosphate Overall Length: 1.750 Available At: GrabAGun