I recently purchased a sub 2k multi mag variant. I installed the tp9 mag catch. Rounds jam (bolt dents case, nose of round jams on top of chamber). Interestingly enough, when I use the included m&p promag with the tp9 mag catch installed the sub 2k runs flawless. How many of you run your sub with tp9 mags? The tp9 mags do move around more in the mag well than the included promag. How can I get my sub 2k to run with my tp9 mags? Thanks