Para. Had one; wouldn't chamber the first round out of ANY mag. If you only loaded the mag half full it would run ok. Sent it back to Para, they claimed it ran good for them I tried it, same crap. Colt, Kimber, MecGar, wouldn't run any of them.
I studied 1911's and finally fixed it myself. Polished feed ramp helped some, but the culprit was the bolt face. Polished the tool marks out of that and it ran good. Their man, George Wedge wouldn't call me back. Finally talked to him months later, told me it didn't leave the factory that way. (Must have been counterfeit! My dealer special ordered it for me.) Actually it left their factory THAT WAY twice.
I dumped it after I got it running.
A real POS in my opinion, and their service sucks. Seems to me that if I, a country boy could figure out what was wrong with it their "experts" could have, or maybe finished it before it left their factory.