Witness hole Guide Glock Pmag Gmag

This is a guide plate to drill witness holes on the back of a 15 round 9mm Magpul Gmag. the holes match the glock factory mag witness holes and follow the same pattern.

disassemble the magazine first, then fit the guide to the back using the notch at the top and drill out the holes with a 9/64 drill bit or similar. cleanup any burrs and reassemble the magazine and you are good to go.

shoot safe.