Anyone notice that the QA models have more failures to fire than the standard da/sa or the 990. I shot about 2000 rounds through my QA 9mm since I bought the gun. Never took the firing pin out and cleaned it. I started to get some failures to fire, I fact I had three failures to fire. I cleaned the firing pin area, took it apart, and had one failure to fire today shooting about 350 rounds. The rounds have a hit but not enough to fire the round. Anyone else havhing any problems like this? In all the rounds shot through my Glock 17 I think I had one or two FTF, in five thousand rounds. I am making it a routine to take the striker out of both my P-99 and Glocks after I shoot and cleaning the striker chambers and firing pins with hoppes 9, a dental pick and then gun scrubber. I believe this is a must with striker fire pistols. Any thought on this matter?