Glock 33 Round Mag question.

[Jack Lawman]

Sometimes the floorplates are a b*tch to get off. You can take a long punch, drive it through the recess in the floorplate, and lever the plate off towards the front of the mag.

This can cause a little "egging" of the recess, so you can do the "squeeze the sides, release the button, push hard" technique (apparently what you've already tried, just not hard enough). Just watch where your pushing fingers will overtravel to when the plate lets go. It sucks when you bang your hand on the table/workbench/vise.