Double posting with a question regarding magazines. I've got a 17 round Act Mag magazine (listed as Armscor when I bought it) marked CZ-75, and it isn't fitting front to back. I made the probably ill-advised decision of forcing it into the mag well, and if I do that the trigger works but the disconnect doesn't (won't "fire" again unless I cock the hammer manually) and I have to really shove on the top of the mag with the slide removed and the mag release pushed to get it loose. I know that the Pre-B frame is slightly narrower front to back but someone earlier said that it looked like I had the new frame. Unless they changed the interior dimensions of the mag well at a different point from switching the trigger guard? Is it possible that I've got old magwell dimensions or is it just likely a bad magazine? It says made in Italy so until I saw the packaging I assumed it was another Mec-Gar OEM magazine.
I don't have calipers so I can't check anything to see if it's tolerance stacking.