Hammers on Lifter gun not set right

[Taylor Heiner]

Update: I just removed the tumbler and this is what it looks like. The shaft itself is not twisted so that crosses that off. I still can’t tell if that shaft and tumbler are made as one piece or if the shaft is fit inside. I know on some guns that shaft is threaded but I don’t want to mess around and break anything. Does that shaft look to be lined up correctly?

[B. Dudley]

The tumbler is all one piece.