That's a highly technical description! Actually, as most of you probably know already, I tend to agree that most people would be much better off to go forth and shoot the gun a lot instead of polishing parts. Doing so not only smooths the parts 'naturally', it also has the added benefit of improving one's shooting skills, and pretty much avoids the possibility of *causing* the malfunctions we see here so often that require replacement of (at least) the trigger bar. I simply have to support Glock in saying that uneducated and inexperienced people should not (in their quest to achieve quick and easy shooting skills) be polishing the parts on a gun that they depend on to work right so they can protect innocent life and avoid needless accidents. Wanna kill these ads? We can help!