I was seduced by the MPX the first time I saw her. Picked up a Gen2 2 weekends ago and little did I know it came with a gen2 mag. Realizing
That one is none I picked up two extra mags. While waiting to goto range I loaded mags and noticed that when I went to chamber a round it would hang up.
I wasn't happy. So I poked around here and followed someone's advice to leave em fully loaded. Let them sit for a week and took them to range last
Saturday. Upon loading same from open bolt they worked flawlessly. Burned thru 250 rounds of 9. Also tested now and she loads from closed bolt also. Upon reading some more here this Sunday I then realized that I have 1 gen2 mag and 2 gen1 mags. They all ran sweet, no issues with either gen mag in my gen2 MPX P 8 inch barrel. Love it.