This AK muzzle brake for sale recoil compensator is designed for AKM, AK47, and AK74 rifles in 7.62X39, 5.45X39, and 5.56X45.223 calibers rifles. It includes a muzzle brake adapter for AKM, AK-47 14X1mm threads LH barrels with a detent, and fits AK-74 24mm X 1.5 RH barrels with a detent. The multi-chamber muzzle brake virtually eliminates all muzzle rise. When shooting prone, there are no ports on the bottom of the muzzle brake to reduce the dust signature. The length is 3.3 inches and it is made from steel with a black finish. Fits Most Russian AK 47/74 rifles and Chinese AK. Will fit others with minor modifcations.