First off
DON'T FILE ANYTHING, no I'm not yelling at you I just want to make sure you see it

And they only offered the 100 rnd mag with the 22 model.
I don't have that problem. But what is it doing other then "can not get the mag to seat", is it the front or the back?
When you give more details I'll get mine out and try to help by looking at mine.