I too will be giving Glock a try. After renting a 19, it didn't feel great but it fit me. I thought the very audible click of each trigger pull was terrible... But then I saw the target. I am able to shoot it quite well. 4 bulls eyes at 30ft out of ten rounds. I'm willing to buy it to try it. they hold their value to sell
I believe that is the powder charge in the round burning. I call it a "bang".