I have run 1100 rounds thru this pistol with no failures. I do clean the gun prior to each visit to the range. In addition I use exclusively CCI mini mags 22 lr copper plated round nose 40 Grain-got a wild hair and also also installed red dot sight using the "Outerimpact" adapter mount-will admit that I was concerned that the added weight of approximately 2 oz. would affect the slide cycle. Happy to say that so far after 300 rounds no failures. Count me lucky and happy I would guess. Semper Fi.