How to fix an AK box magazine

I got an A K automatic box magazine with my Classic Army SAW and it stopped working (sad day) so I took it apart and found out it was very simple to fix so now it works fine If you can afford it the other box magazine is much smaller but holds the same amount and has a pressure switch built in (the echo1 and classic army SAW both use the same box mag) regular box mag 60 br, br,