Conical Flash Hider as used on the Advisor M1 Carbine Pistol, M1 Scout, and Jungle Carbine. The Inland Conical Flash Hider is constructed of steel with a matte black finish and threaded with 1/2" x 28 tpi threads and requires a threaded barrel. 9/16" flats are milled to make installation and removal simple and easy. This flash hider will work with any barrel with 1/2 x 28 threads and is open bore so that it is not caliber specific. Made in the USA!