Luger will not fire until the trigger is pulled twice.

[Lugerdoc]

James, Your luger is suffering from the classic disconnecting problem. I'm sure that you will learn a lot about the PO8s "rube goldberg" designed firing sequence from this project. I've been correcting these problems for over 40 years and can't tell you exactly what to try next. It's easier on a mismatch shooter where you can change triggers, sears or trigger levers without having to worry about mismatched parts. But on matching PO8s, it usually comes down to finding (bending, etc) the right angled trigger lever, not shimming or building up parts. TH