6.125" Vented (A1) Muzzle Brake for AK-47 14 x1 LH. This AR-15 style 6.125" vented muzzle brake/flash hider 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, muzzle brake with locking notches to prevent any movement while under fire. It is threaded 14 x1 LH for the AK-47, fits Century Arms C39 AK, all Draco and many other AK47 pistols and rifles. It can be pinned and welded for compliance as well. Weighs about 9 ounces.