I have a itch for a glock 17 for some reason or another. I was recently at a handgun training course and several people were shooting glocks including myself. are the size of them comparable to my 21sf or is it closer to the glock 21. and I posted a similar question about this before and it seems summit gun broker is going to have the best price on one, feel free to suggest any other places to get a good price on a used one , since I kinda like the look of the generation one's and two with no finger groves it seems as if it will serve as a glove box/ range gun just curious on you alls input.and ammo is cheaper in 9mm right now