Got my PSAK 103K back a few days ago and was able to test fire it today.
I was able to fire a quick 180 rounds without a hickup. I am happy.
Changed out the bolt and the gas tube, according to their email. Not sure what the problem was with the original bolt and gas tube, but whatever it was, swapping out new parts worked.
I know it is a PITA when a new gun wont function properly right out of the box, or anytime for that matter, but PSA stands behind their product and I am good with that.
Happy owner of 2 Romanian kit GF3s, a Spiker, a GF5 side folder, and this 103-K.