I replaced the trigger bar and it worked until about round 637 when trigger bar stopped springing back up when pressed downward, causing reset issues. Either wear to the trigger spring groove in the bar or an out of spec grip or both were causing this issue. I ordered another new trigger bar and grip, and replacing these along with replacing the center frame pin with the clipdraw screw (center pin was walking out), appeared to have sorted that issue and it worked until the extractor screw came loose and started causing FTEs around 760 rounds (this is not a big issue and is not a defect). I snugged the extractor screw down and it ran until about 790 rounds, whereupon the slide started staying jammed to the rear after every shot. Slide lock was not engaged... something very wrong. At 793 rounds I called it dead after looking closely at the ejection port and seeing cracking along the front and rear corners. Ammo was all non +P 124 grain ball other than about 14 rounds of non +P WWB 147 JHP. I will contact Kel-Tec but I'm not paying to ship the pistol back to them. I have no interest in a replacement. If they want to look at the slide I'll send it to them.