I'm just a newbe to Glocks but my recently purchased G20SF has been flawless for around 300 rds. . I've only used 180gr. Precision One ammo and Underwood 165gr. in it so far. I'm probably guilty of overlubing it as I treat it like my other pistols. The only "mod" I've done is to polish down the bump in the trigger bar because it rubbed against the frame to the point where it made the trigger feel heavier. Personally I would let Glock sort it out before I changed anything. Again, I'm a Glock newbe and my opinion is worth what you paid for it.
Last edited by nunnya; 10-07-2013 at 19:43..