New In the Box SigSauer P365 Micro .9mm. The SIG Sauer P365 High-Capacity Micro-Compact is a polymer frame striker-fired semi-automatic pistol manufactured by SIG Sauer and intended for everyday carry. It is chambered in 9×19mm Parabellum and is rated for +P ammunition while utilizing offset double-stack magazines. It is offered with Tritium XRAY3 Day/Night Sights and two 10-round magazines; one flush fit and the other with an extended finger tab. The P365, which replaced the P290RS, is produced in Newington, New Hampshire. (cc with be charged a 3% fee, you can also pay with a USPS money oreder.)