So being that I'm on a tight budget and I want to make my glock as good as possible I decided to polish up the feed ramp and the metal in the lower reciever using nothing more than tooth-paste, q-tips, and cotton rounds. I took it out yesterday and put about 100 rounds through it. The difference was amazing. The trigger was smooth as can be and made follow up shots with my 21 a dream, as well as imrpoved my accuracy. Now make no mistake, there was nothing wrong with it to begin with. I just wanted to improve the trigger pull. How do u think I did?