Built on the P320’s modular fire control unit, the Sig Sauer P320 XSeries blends modern ergonomics with practical, service-ready features to deliver a versatile 9mm platform for duty, competition, and everyday range work. A 3.9in barrel provides a balanced sight radius and controllable muzzle impulse—longer than compact carry barrels but short enough for comfortable handling—while the Optics Ready Cut Slide accepts a wide array of micro red-dot footprints so shooters can fit a reflex optic without cutting corners on slide durability or reliability.