I only have about 200 rounds through this new baby, and maybe that is the problem. But in both mag.s that came with it about 50% of the time somewhere around round 5 or 6 I fail to return to battery completely. I can pull the slide back a bit and let it slam shut and good to go, almost like weak return spring but the gun is not even broke in. I am wondering is anyone else is seeing this or if I am just anxious and haven't got it broke in yet. Cant say I am partial to the new trigger safety system. If I wanted a Glock I would have bought one. do like the Glock like take down though. Oh well.