I recently got a use 36. My first trip to the range had me doubting my purchase. I had 10 or so times when the slide locked to the rear on a live round. At first I thought "maybe" its me. Next trip to the range and the same thing. Long story short, I had the slide stop replaced & it has been flawless for several 100 rounds since. I have a 19 & a 23, but the 36 is by FAR my favorite! It has become my primary CCW.