The SIG P320 X 9MM 3.9" XRAY3 from Sig Sauer brings the XSeries platform's modularity and duty-grade performance into a compact, carry-friendly package that requires an FFL transfer for purchase, so buyers should plan accordingly; the polymer frame and striker-fired, semi-auto action make it light on the draw while the 3.9-inch nitride-coated barrel and black slide deliver corrosion resistance and hard-use durability for range days, home defense, or professional duty use. This XCARRY-style model carries the Shield/RMSC optic footprint and XRAY3 night sights for low-light target acquisition, giving shooters fast sight alignment and the option to mount red dot optics for competition or defensive setups, while the 10-round capacity in 9mm Luger balances concealability with practical firepower. The XSeries lineage means you get a highly serviceable fire control group and modular grip options, plus a textured polymer grip for positive purchase in varied conditions; whether teaching new shooters, running drills on the range, or equipping a patrol-ready sidearm, the P320 X 9mm 3.9" XRAY3 is engineered to deliver consistent triggers, controllable recoil, and an optics-capable platform suited to modern shooting demands.