Just noticed tonight while dry fire practice(with snap cap) that my CZ 75 Compact has developed a rattle. Or haven't noticed it before. I field stripped the gun to locate it and its in the frame/mechanism. It occurs when I do two things- 1) Shake the gun. Only happens when the hammer is down, not on half/full cock. 2) Hold the hammer all the way back, and pull the trigger (not releasing it). When I pull the trigger the noise happens immediately and almost sounds like two marbles clanging into each other. I cant see anything broken but haven't detail stripped the guts cuz its a lil tricky. Shes only got 3-4 hundreds rds through her and hasn't missed a beat until yesterday, she stove-piped twice (doesn't like Blazer Alum). I used her today to qualify for my CCH. Anyone else's 75 do this? Thanks