Ibmikey:
Although we know that it's not a Mak, there is a unique 'sticky' about the P-83 on Makarov.com: "Polish P-83...More than Meets The Eye" by BWilhelm, with large photos showing many very clear internal details. I've had one for about a year and reportedly it's a very clever design.
The guns are said to be equally reliable and as rugged as actual Makarovs, but the stamped parts and thin bluing will always be seen as drawbacks. There could be other drawbacks which I've not yet read about.
My quite seasoned gun buddies (also middle-aged) always carry the snappy P-64, but had never seen the 83.