Wow! Lots of opinions from people who either don't own, don't use, or don't know their butt from a hole in the ground when it comes to a Glock Model 21.
I've carried one (almost) everyday, now, for the past 6 years. I know how to dress around and move while wearing a pistol; and, for a fact, nobody has, 'made me' in at least the past 3 years - No one at all, not even when I'm at church!
The G-21 isn't difficult to shoot. The wide backstrap is actually more comfortable and easier to hold onto for an extended period-of-time than other pistols with much narrower frames. I'm older and my hands are slightly arthritic; I find the G-21's wide backstrap to be perfect for 2 or 3 hours of range use.
If you know the difference between your rear end and a hole in the ground then you will appreciate that it's how you dress AND the holster you use that most affects how well your pistol remains hidden. A loose or a thin belt will give you away every time. OTB holsters worn on the point of your hip are, also, a no-no. Always try to use a holster that pulls the end of the frame, tight, into your body.
Me? I love my G-21 pistols. I've no doubt that I'll be carrying them for the rest of my life, too. They are extremely soft-shooting and very easy to control during rapid fire events. My hands are not unduly large; however, this is the only shortcoming I can see with the G-21. If you have to shift your grip in order to release a magazine; or if the distal joint of your trigger finger doesn't lie in front of the trigger's face when it is in the full forward position, then, a G-21 might not be the best choice for you to make.
(Shifting your grip in order to get at the mag release is no big deal, though. You can always use the thumb of your support hand to do this if you really have to.)
One of my G-21's -
Typical 16 yard accuracy -
Needless to say, I'd wholeheartedly recommend a 3rd generation standard magazine release and light rail Model G-21 to anyone who fits the gun. (Stay away from the model with the ambi mag release; and, if you find any good use for that frame with the Picatinny rail on the dust cover I'd really like to know.)
