This ported 3.5" muzzle brake/flash hider in 14x1 LH threads is perfect if you want to add some length to a short barreled rifle project or are looking for a different look for your AK. It is a machined steel, ported muzzle brake with locking notches to prevent any movement while under fire. It is threaded 14 x1 LH for the AK-47. It can be pinned and welded for compliance as well. Weighs about 5 ounces.