This coated steel muzzle brake is U.S. made and has four pronged tips shaped to penetrate wood, sheet-rock, and glass for any tactical situation. The brake is designed to fit standard left hand threaded AK models and is backed by a lifetime guarantee.- Four heat threaded pronged tips - Length = 2.8125 - Fits standard 14 x 1 left hand threaded AK Models - Counts as 1 U.S. 922r Compliant Part