I have to agree with some of this guy's reasons and add one. Due to the rifling of the Glock barrels you should not shoot lead ammo through it and would need to then buy another barrel to shoot lead ammo with. The damn gun should shoot anything you feed it period. Seems as if people purchase the Glock and then have to change everything out to make it function right or better. Why doesn't Glock just make those changes and sell the gun that way?