I have heard about this canted gas block which I believe from my research to be when the gas block is not centered in the rifle. Now from what I hear it is rare to have happen, but when it does it's generally "bargain bin" WASR AK's. how rare is it to happen, and what are other AK manufacturers that are still within 300-400 dollar range that are quality, and are less likely to have this probblem.