I think I originally started this thread talking about the Robertsons redo on the MecGar 59 10 round; having a new shorter plastic floorplate on the 10 round metal tube. I mentioned ( I think) in passing I had one of MecGar's 10 round full size for my 559. It has worked without one fail in both my 559 and 669. And the redo from Robertsons has also had zero fails.