Hi all, Abit new here... I tried to search for this particular question but did not find anything so I figured I would post and see if anybody has any opinions. I'm still waiting for the next trip to my local range to try out both the 21 and 30 but figured I would also ask some of the people here. Currently I own a Glock 19. As it was my first gun, I decided to go with the 9mm round and I picked the Glock as I liked the way it felt in my hand and how it shoot versus a few other guns I tried (Beretta, Springfield, etc.) I am looking to go to a .45ACP size round but cannot decide between the 21 and the 30. I would like to think the 30 is probably going be closer to my current Glock 19 in the way of size, etc. but I am wondering how big of a difference is in "perceived recoil" between the Glock 21 and 30 vs. my 19. Also another considering factor is I am getting my Concealed Weapons Permit shortly after Christmas so I am also looking as far as how easy it is to conceal either weapon. Any opinions from someone who has experience with these guns and can compare them would be most helpful ** On a side note, I should say that I have tried the Glock 17 and 26 when I was deciding which 9mm to purchase. The 17 felt slightly too large in my hands and the 26 was uncomfortably small in my hands.