Beretta BU9 NANO.

THE IDEAL CONCEALED-CARRY PISTOL
Small, powerful, intuitive to use and with a low and snag-free design, the Nano is the perfect pistol for concealed carry and self-defense. The Nano was designed with one goal in mind: creating the ideal micro-compact pistol for concealed carry and personal defense. Thanks to its thin, snag-free profile, the Nano effortlessly glides in and out of your holster, while its smooth contour and low weight offer you maximum comfort even for all-day carry. Its operation is simple and intuitive, and its modular design gives you several custom options requiring no gunsmithing.