SIG Sauer P320 X-Full 9mm 4.7in XRAY3 2x10rd
Video review
Expert review
About this product
What is the SIG Sauer P320 X-Full 9mm 4.7in XRAY3 2x10rd? It is a duty-grade, modular striker-fired pistol with a full-size 4.7-inch barrel housed in SIG's popular X-Series platform, designed for accuracy and accessory integration right out of the case. This is not a standard P320; it incorporates the specific ergonomic and sighting refinements SIG developed for its competition and professional lines. You are looking at a modern duty pistol engineered for repeatable performance, shipped with two 10-round steel magazines to assist with compliance in capacity-restricted jurisdictions.
What is the SIG Sauer P320 X-Full used for?
This pistol is a natural fit for the USPSA Carry Optics division, home defense, or as a high-round-count training platform. The 4.7-inch barrel provides a longer sight radius and improved velocity for consistent accuracy, while the optic-ready slide allows direct mounting of a red dot sight. It balances the weight of a full-sized frame well for controlled firing, though its 8.0-inch overall length makes it less suitable for deep concealment compared to a dedicated compact like the Glock 19.
How does the SIG Sauer P320 X-Full compare to the Glock 17 Gen5?
The SIG P320 X-Full offers superior out-of-the-box ergonomics and a cleaner trigger break than the standard Glock 17 Gen5. Where the Glock 17 relies on its legendary reliability and vast aftermarket, the P320 X-Full provides a more aggressive grip texture, a higher undercut for a natural high hold, and a 0.2-inch-longer barrel for a ballistic edge. For my money, the X-Full is the better choice if you prioritize grip feel and modularity from the start, while the Glock 17 remains the benchmark for simplicity and parts availability.
What does it weigh and what are the dimensions?
Unloaded with an empty magazine, the P320 X-Full weighs 29.6 ounces (839 grams), which is 4.4 ounces heavier than the compact-frame SIG P320 X-Compact. The slide measures 4.7 inches in length, and the overall pistol length from muzzle to the back of the X-Series grip module is 8.0 inches. The grip module itself has a width of 1.3 inches at its widest point, which accommodates most medium to large hands but can feel blocky for some shooters with smaller frames. This weight and size provide excellent recoil mitigation during rapid-fire strings.
Who is this NOT for?
This pistol is not ideal for a new shooter on a tight budget who won't immediately benefit from its duty-ready features. Its 8.0-inch length makes it a poor choice for primary concealed carry for most body types; a shooter seeking that role should look at our Stevens 555 Sporting Compact 20ga or other dedicated compact firearms. Furthermore, if you are in a free-state and prioritize maximum capacity, the inclusion of only 10-round magazines is a constraint not present on the standard model.
What's in the box?
You receive the complete pistol, two 10-round steel magazines (model MAG115-10-B), a chamber flag, a polymer hard case with foam insert, and the standard SIG owner's manual and lock. Notably absent is a cover plate for the optic-cut slide; if you do not mount a red dot, the rear portion of the optic pocket will remain open, though it does not affect function. The magazines are the standard, high-quality SIG steel-body units rated for thousands of cycles.
Is the SIG Sauer P320 X-Full worth it at $744.99?
At this price, you are paying for the factory-installed X-Series upgrades over a standard P320, which would cost you more in parts and gunsmithing later. The value hinges on whether you need the improved grip geometry, XRAY3 sights, and optic-ready slide immediately. If you plan to heavily customize the pistol anyway, a base model and aftermarket parts might be more cost-effective. However, for a shooter wanting a competition-ready or duty-optimized 9mm out of the box with a clean warranty, the $744.99 tag is competitive. For a different kind of ready-to-use firearm, see our breakdown of the Stevens 555 Sporting O/U 12 Gauge.
Specs at a glance
Pros & cons
What works
- Optics-ready slide accepts Doctor/Noblex pattern red dots (e.g., Holosun 507C) directly—no adapter plate needed.
- XRAY3 Day/Night sights provide a bright 3-dot system usable in near-total darkness for over 12 years.
- X-Series grip undercut and texture promote a consistent, high grip that reduces muzzle flip by an estimated 15-20%.
- Weighs 29.6 oz unloaded, providing mass to manage 9mm recoil compared to polymer compacts.
Trade-offs
- Includes only 10-round mags—free-state buyers must purchase standard 17-round or 21-round magazines separately.
- No optic cover plate is included; the rear of the optic cut remains exposed if no red dot is installed.
- The aggressive grip texture can be harsh on bare skin during all-day training sessions without gloves.
Key attributes
| upc | 798681663651 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320XF-9-BXR3P-R2-10 |
| action | Striker Fired |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 4.7" |
| caliber/gauge | 9mm |
| capacity | 10 + 1 |
| color | Black |
| length | 13.5 |
| magazine included | 2 x 10-Round |
| model | P320 |
| number of magazines | 2 10 rd. Steel |
| package height | 3.0 |
| package width | 9.7 |
| product type | Semi-Auto Pistol |
| safety | Manual Safety |
| shipping weight | 3.45 |
| sights | Fixed Sights |
| sights type | Fixed Sights |
| slide description | Optic Ready/Serrated |
Frequently asked questions
- Is the slide optic cut compatible with a Holosun 507C?
- Yes, directly. The slide is cut to the SIG Sauer RX footprint, which accommodates the Doctor/Noblex pattern. The Holosun 507C uses this pattern, so it mounts without an adapter plate. Secure it with the provided screws and torque to 12-15 in-lbs with blue threadlocker.
- Does this pistol fit in a Glock 17 holster?
- No, it will not. The P320 X-Full has a distinct slide and trigger guard geometry that is incompatible with Glock holsters. You need a holster specifically molded for the P320 full-size (non-ledge) slide. Popular makers like Safariland (model 7360) and Tier 1 Concealed support this model.
- How long does shipping take to an FFL?
- For in-stock items, shipping to your selected FFL dealer typically takes 3-5 business days from order verification. This does not include the FFL's processing time once they receive the firearm, which can add another 1-3 days before you can complete the transfer.
- Can I change the grip module to a smaller size?
- Yes, absolutely. The P320's modularity allows you to swap the full-size X-Series grip module for any other P320-compatible grip. Installing a compact or carry-sized module from SIG, Wilson Combat, or others takes about 60 seconds with a punch to drive out the takedown lever pin. The fire control unit (the serialized part) transfers over.
- Does this work with a T.Rex Arms Sidecar holster?
- Yes, but you must specify the correct model. T.Rex Arms offers the 'Sidecar' for the 'P320 Full Size' with or without a weapon light (like the TLR-1 HL). Ensure you select the non-ledge/standard slide option, as the X-Full uses that profile.
- Are the sights suppressor-height?
- No, they are not. The factory XRAY3 Day/Night sights are standard height. They will not co-witness with a red dot sight mounted directly to the slide, and they will likely be obscured by most pistol-caliber suppressors. If you plan to run suppressed, budget an extra $90-$120 for taller aftermarket sights.