The correct name was the P7K3. If with a straight blow ack that used a buffer to cushion the final slide movement.No it wasn't. I've got some similar, boneheaded moves in my past.
A P7K? Wow, just wow. Didn't know they existed.
It was designed to be convertible between 380, 32acp and 22LR. I think of it as P7 meets HK4.
While P7 9mms would feed rocks I found the K3 to.be a little temperamental. Blasphemy I know but it's just another data point to support the straight blowbacks are not quite as reliable theory.
Even then, the calibre conversion kits were as rare as hens teeth.