This is my first post here. I am a long time CZ lover. I have had CZ pistols in the past. Recently I had a 40P and sold it. A few months ago I came across a two month old 9mm Compact. Two months old. Came with 4 magazines, paperwork and cool competition sight in the rear. Bought it from a private citizen for a fair price. Well. As of yesterday, I have run about 450 rounds through it. MAJOR problems include failure to go into battery, failure for slide to retract after firing - it had to be forced open - , FTE/FTF and all this occurred with several brands of ammunition - all new FMJ 115 or 124. Yes, I had the rangemaster check it out and the local range gunsmith and all found no issues with the frame, slide, recoil spring, guide rod. Yes, it was cleaned and lubed properly. I asked several competition shooters -friends - for advice and all said to check the same. A call to CZ customer support provided that I am to file a warranty claim. Well. Does anyone have any thoughts? Many thanks in advance.