Do you have an empty magazine inserted when you dry-fire your P99? If you do, it's probably the magazine spring that's resonating. My P99 makes a "sproinging" sound when I dry-fire it with the empty magazine inserted. The sound goes away when I dry-fire with the magazine removed.[b said:Quote[/b] (cahill99 @ Oct. 13 2006,1:31)]I don't know how to fix it. I've cleaned my striker, and still the proble presists. Also when I dry fire in DA mode, the spring makes this toy like "PRONG!!" as the striker snaps forward.