Ok, this is embarrassing, but for everyone's amusement.... [drum roll...] It was my fault... I just got new MBX mags for my new limited gun, and the pins are able to be pushed with the finger. When I got my 9mm mags, I remember now, taking them apart and scraping out "that black rubbery piece" out of the hole that was keeping me from tightening the set screw all the way. Someday I will quit tinkering; or well, maybe not. Sometimes you win and sometimes.. well yea, we don't talk about option B