This Romanian PAR-1 is mostly made up of traditional AKM parts with a twist. It features a pump action mechanism rather than a functioning gas system.
Interestingly unlike most pump actions the pump on this rifle is spring loaded. Meaning that it will slide back forward after being pulled back and released.
It wasn’t designed to be easily converted by buyers, but was a way for sellers to use most of their existing parts assembled with some new parts to make something legal to sell.
To convert this to semi-auto would require drilling a gas port in the barrel, fitting a gas system, and figuring out how to put on some standard handguards or saw down the pump handguard to fit and stay affixed. I don’t think there’s any point in time when this would have been worthwhile to do compared to just getting a semi-auto AK from the start.
In terms of wacky things done to comply with laws, it’s the AK version of this: