.40
I believe it does have attributes that are good. I carry a Glock 23 .40 caliber stoked with Glock Model 22 magazines. This makes for a 16 round .40 in the same package as the Glock 19. This is a very accurate reliable package. I've found nothing better yet for concealed carry. I find other pistols I like very much. However, they are always heavier, lower capacity, mags unavailable or cost a fortune, and perhaps less reliable. I know that capacity is not every thing. And if you can't do whatever with the first seven, you probably in over your head anyway. That being said, I've grown fond of the capacity of this combo. Very hard for me to transition to something like a Sig P239 with 7 rounds and more weight. Just saying, and your mileage may vary.