Ejection problem

[4 Scale]

I'd suggest remove and inspect extractor and ejector for starters. If you have another Luger, perhaps swap out those parts and see if function improves. Also try a different magazine and ammo. Change only one thing at a time.

I would also suggest hand-cycling with snap caps to see if that tells you anything. And it would still be helpful to know what ammo you are using, if the Luger is matching, and what the past malfunctions were.