After all the 9mm Gen4 buzz over last couple years I was not sure what to expect. I did know I like the fit and feel of the Gen4 19. It has #4 spring and pulled on 12/30/11. I bought it and I went to the range same day and put all sorts of ammo down range. 700+ rounds on target and not one FTE/FTF. Perhaps Glock is getting bugs worked out compared to previous Gen4 9mm (some of them anyway).