It’s a G27, the subcompact, with a two round magazine extension making
it a 12+1.
What’s cool is I can put a 357Sig conversion barrel and 9mm conversion
barrel in it with a 9mm mag and it’s three guns in one. I actually keep the
9mm barrel in it full time. I think you can convert the G17 the same way
only with longer barrels.
I can do the same with the G32 Compact/.357sig, and convert it to .40cal or 9mm, but with the .357sig so much more powerful, and all the ammo I have for it, why would I want to? Never could figger that one out. The .357/.40 mags are the same, but 9mm would require new mags. I have 13 of the older 10-rnd mags, plus 3 of the .40cal 29-rnd mags, which work for the .357sig round. Awkward to conceal, but fun at the range.