I got one last year from a buddy, unconverted, unfired. When I took it out for testing, it wouldn't cycle target loads, regular 2 3/4” loads or 3" correctly. Gas adjustment knob was set to high (only 2 settings). Got this:
https://www.carolinashooterssupply.c...plug-saiga.htm
Now it cycles everything from low recoil Target to regular Target and beyond just fine. Stay away from promag magazines, mine needed considerable filing internally to allow shells to freely move up to the chamber. Paid $700 for it.