I figured out why sometimes inserting a magazine in my wasr ak won't go in.

The wasr has no freakin dimples! It has nothing to do with the shape of the mag well. It has no dimples to guide the magazine, so if you mistakenly twist the mag or insert it at a slight angle, the rear lug will push against the side walls of the mag release assembley and won't go in.

The welded plates don't do shit to guide the magazine in. They allow the magazine tower to scrape against the side of the well and cause the rear magazine lug to never make contact with the actual release lever. The fact that my wasr's magazine well has been over milled and very loose probably doesn't help either.