ok, so i have some 10 round mags, and some 15 round mags for my G22 (.40S&W). however, i HAVE TO limit the 15 round mags to 10 rounds for legal reasons. how do i do that? i can't seem to find a guide online for it. i know i can just buy more 10 rounders, but i already have 4 of the 10s and 3 of the 15s and really don't feel like buying even more. it is as simple as putting in a rivet into hole number ____? or do i have to take it apart and glue in a block or something somewhere?