Hey there. New FNX-45 Tactical owner. Getting ready to go to the range for the first time with the new FNX, after cleaning the gun, I numbered my mags and cycled them each through the gun (empty). One mag (again empty) would not hold the slide locked back. Also couldn't eject it. Finally managed to get it lose holding the slide back manually and pressing down the follower and "resetting". Tried it a few cycles of dropping the mag, locking the slide back, releasing, locking back and sometimes this same mag was OK, and sometimes it would fail to engage the slide lock.
I can't tell if the follower occasionally gets hung up on the slide catch (keeping it from releasing), but when it happens, it looks like the follower is off to the side a bit (missing the metal lip it's supposed to push up) and then the metal lip (sorry don't know the exact name), is digging into the side of the plastic follower.
Anyone else see this problem?