G27.
In the family of "baby GLOCK", it is compact for easy concealment, yet carries 9+1 rounds of .40S&W stock. With a
Pearce +1 Mag extension (P/N:
PG-2733), you can have 10+1, a place to have your pinky sit, and very little loss in concealablility.
Carry premium rounds such as Winchester Ranger SXT Talon 165gr (what I use) or 180gr .40S&W or any other premium Hollow Point and you won't have any issue with penetration or 'stopping power'.
Add in a
Blackhawk CQC Serpa holster (can be purchased a little cheaper without the 'carbon fiber' sticker... yes, it's a very thick sticker) and you're in business for any OC or CC situation. I know... I use this exact combination.
