SIG Sauer P320 9mm 4.7-Inch Semi-Auto Handgun

Description

The P320 X-Full is Sig Sauer’s full-size take on their modular P320 platform, built for shooters who want a longer sight radius and a grip that fills the hand without giving anything up in reliability or trigger quality. It suits competition shooters, duty use, and serious range work equally well — anywhere a compact isn’t required and the extra frame length pays dividends in control.

At the core of the P320 is Sig’s serialized fire control unit: a self-contained chassis that houses the trigger group and carries the serial number independently of the frame and slide. This means the functional heart of the pistol can be moved between grip modules and slide assemblies, making the platform genuinely reconfigurable rather than just adjustable at the margins. The trigger itself is striker-fired with a consistent, short pull that resets close to the break — a geometry that rewards deliberate technique without punishing less experienced shooters.

This particular configuration ships with the Romeo RS Pro optic installed on the slide. The Romeo RS Pro is a reflex sight designed specifically around Sig’s mounting system, sitting low enough that the co-witness with the included night sights remains usable. Those tritium sights matter: if the optic goes down or the battery runs flat, you have a fallback that works in low light rather than a fallback that only works in daylight. Two 17-round magazines are included, giving you a loaded spare from the box.

The XFull grip module is longer than the standard P320 grip, which translates directly into a lower bore axis relative to the hand and more surface area for the support hand — both of which reduce muzzle rise during fast follow-up shots.

Shipping and availability: This item cannot be shipped directly to California, Rhode Island and Washington. Check your state and local requirements before ordering.