Everyone I know with a Glock has customized the heck out of it to make it "fit." I have quite a few HKs and not one has needed any changing. Nor have any of them ever failed me every with crappy ammo. Darn it, here I'm starting an opinion war. Glock makes a reliable pistol. HK makes a quality pistol. I hope all parties are satisfied and I withdraw from the discussion re Glock.Glocks work. They are reliable accurate and ugly but out of the box they are hard to beat. Numbers don’t lie. I’m a huge fan of SA firearms and I talk with a lot of people that say that Glock doesn’t “fit” them, they have never said they had to dump anything in them though.