This is a well-made brake muzzle which threaded onto my I.O. AK Sporter with a satisfying snug fit. It's slightly smaller than an AK-74 muzzle brake, but it's easy to see that its design is based upon it, and I suspect, it's an improved version of the Russian model. Although I haven't fired this rifle yet, I'm confident this LBE brake will perform as well, or even better, than the original AK-74 brake.