Just picked up a P938 Equinox today. Did a quick field strip, lubed all the areas that looked like they could be wear surfaces with grease, reassembled, everything felt great. Put 200 rounds of Blazer 124 FMJ through it, then finished up with 6 rounds of HSTs, everything was fine -- no FTL/FTF whatsoever. Unloaded it completely, let it cool down a bit, and put it back in the case.
Brought it home, then took it out of the case. Attempted to rack the slide, no go. Moved like a couple millimeters then locked against something. I tried pulling fairly hard, but it was definitely blocked up by something. Confused, I tried ejecting the mag, no change. Then I flicked the safety from safe to unsafe, and then the slide moved freely again. Tried a bunch of dry fires and reracks, with and without mags, no problem since.
That odd "failure" is a little scary for what might be the carry gun. Any idea what might have gone wrong there and/or what to check?