I bought a Walther p22 (stamped Walther on one side and Smith & Wessen) on the other. It has only been fired maybe twenty times. I have tried six different ammos and it appears the firing pin does not strike the rim with sufficient fource. Right now it is only good to throw at something or a paper weight. Expecting better. What is the fix for this? Having to replace the pin seems like a real failure on Walther's part if it only last a few shots. Very unhappy with the gun. I am sure others have had this frustration. Anyone with suggestions/fix would be appreciated.