I've noticed that the firing pin does not protrude very far at all from the rear of the breech (where the hammer contacts it). When I push it flush with the breech with my finger and slowly release it, it is BARELY above being flush with the breech. If I tilt the gun backwards and tap (or pull it out with my finger), the full length of the firing pin is exposed, much more so than when it is depressed and slowly released. Basically what I am trying to say is that the spring provides very little resistance in forcing the firing pin to be exposed to the rear of the breech; very little is above flush (it almost looks flush) unless pulled out by hand or gravity (but of course, there is nothing to keep it at that point). I disassembled the firing pin assembly and cleaned it, but it didn't change anything. The spring seems to short.

Is your firing pin the same way?