I also have an FEG PMK 380. Unfortunately, it is winter here in Northeast Wisconsin and I haven't had a chance to fire it more than a few rounds.
I had my gunsmith do a bunch of work on it, including a trigger job (as far as one can go, considering the starting point), bluing the slide, shotblasting the alloy frame to a natural color, smoothing rough edges on the trigger, smoothing the feed ramp, and replacing the front sight with a small shotgun brass bead. I'm pleased with the final two-tone look, at least.
I did have a problem with one of the mags. It would not come out of the gun without taking off the grip panels! I sent it in to the importer KBI with proof of purchase, and they replaced it immediately with a good one. The mag fit is a bit on the tight side for my taste (guess I won't shoot IPSC matches with it, ha ha).
Also, I still have to find the right sight picture with the front bead and original (and minimal) rear sight with a rounded notch. Of course, one might argue that this is a point-shooting piece.
I look forward to putting a few hundred rounds of Winchester 380 though it when the weather warms. I would prefer non-full-auto operation.
AndyP