Converting Hungarian or Polish Blank/rifle grenade charge Mags

Blank mags use cartridges without bullets to fire rifle grenades. To prevent shooting the grenade with regular live ammo, they issued a special short magazine to hold 10 blanks, with a welded steel blocking bar to prevent live ammo and allow only launching blanks to be loaded. To convert to a regular ammo 10 round mag we must cut and pry out the bar and the welds. 

The blocking bar is welded at the top and bottom of the magazine. Remove the floor plate,spring and follower. Cut the bar at its 90 degree angle in the bottom side. Wear safety goggles. I used a heavy duty dremil cutting disc. I made several notches in the 90 degree angle, closely spaced and then almost 45 degree angle cuts on the sides. You just have to get a pair of pliers on it and break one side free. Then wiggle and pry it off the top side. Once the bar is out use a pair of channel locks to pry off the cut piece of bar/weld. File or sand and coat the bare metal...I used a sharpie.