After reading countless threads on some people experiencing an issue while others are not, I pulled the trigger and purchased a new Gen4 G19, my first Glock. I've put 500 rounds through it so far, and 1 in 50 or so will come straight back at the shooter's face. There are a thousand and one threads regarding this issue, yet most discuss "limp wristing", crappy ammo, etc. I'm shooting Fed Factory 115 grain. Trying to keep it simple, what part can I replace here to correct this issue? Other than this issue, the pistol shoots great and feels awesome in my hands. I purchased it mainly for the range and HD for my fiance. She shot a friends so well that she wanted her own!