I get one AMSKSL for my Russian SKS, but I am really disappointed. Fitting size on the rifle for this muzzle is 14 mm. Fitting size of the hole on the actual muzzle brake is 14.7mm. It sits loose and is moving up and down.
I contacted NcStar about this issue. They had checked current stock and all the brakes there are the same size. I also have short muzzle brake for SKS from NcStar AMSKS. It sized 14.2 mm and sits perfectly on my SKS.
I asked NcStar how they happened to have different sizes for the same rifle - they have no answer for that, but promised to investigate this issue and replace mine. But it will take them at least 2 months to do it, because the shop is in China.
I hear who ever use it on Chinese SKS is happy - it is possible that there is a different fitting size on the barrel. I don't know, but it's not for a Russian SKS. I had tried on another rifle that a friend of mine has - and it is the same problem.
I had call NcStar after 3 month of this review and they said, that need to sale current batch of muzzle brakes - defective, in order to make new with correct size!!! Buyers be aware: they still sale defective and possible dangerous product, that may damage rifle and/or injured shooter.