SIG 320XF9MOD10 P320 9MM 3.9 10R CMP OR BLK
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Specs at a glance
About this product
The SIG 320XF9MOD10 P320 9mm 3.9 10R CMP OR BLK is a factory-built competition pistol from SIG Sauer, purpose-made for the U.S. Army’s Modular Handgun System trials and now available to civilian shooters. This 9mm semi-auto features a 3.9-inch barrel, 10-round magazine, optics-ready slide, and a black nitride finish—all built on the proven P320 platform. It delivers the same accuracy, reliability, and modularity that won the military contract, but in a compact, competition-ready package.
| Manufacturer | SIG Sauer |
|---|---|
| Model | P320 XFULL (CMP) |
| Caliber | 9mm |
| Barrel Length | 3.9 inches |
| Capacity | 10 rounds |
| Material | Stainless steel slide, polymer grip module (per manufacturer specs) |
| Finish | Black Nitron |
| Weight | 29.5 ounces (unloaded, per SIG Sauer) |
| Condition | New |
Key Features
- Optics-Ready Slide: The slide is pre-cut for popular red dot sights like the Trijicon RMR and SIG Romeo1Pro, so you can mount a dot without a gunsmith. This is critical for fast target acquisition in competition or defensive use.
- Flat Trigger with 4.5-5.5 lb Pull: SIG’s X-series flat trigger offers a crisp break and short reset, giving you consistent shot control during rapid fire strings. It’s a direct upgrade over the standard curved trigger.
- Modular Grip System: The polymer grip module can be swapped in seconds to change size or color, letting you fit the gun to your hand or holster without buying a new firearm.
- 3.9-Inch Carbon Steel Barrel: The barrel is precision-rifled and coated with SIG’s Nitron finish for corrosion resistance and long service life. It’s the same barrel spec used in the M17/M18 military pistols.
- 10-Round Magazine (2 Included): Comes with two 10-round steel magazines, making it legal in restricted states while still offering a solid capacity for range use or competition.
Who It’s For
This pistol is built for the competitive shooter who wants a factory-tuned gun straight out of the box—no aftermarket parts needed. It’s also ideal for the southern bird hunter who carries a sidearm for varmints or plinking between dove fields, thanks to its compact 3.9-inch barrel and reliable 9mm cartridge. If you’re a SIG fan looking for a dedicated optics-ready platform for USPSA, IDPA, or steel challenge, this is your gun.
Pros & Cons
- Pro: Factory optics cut saves you $100+ on milling and keeps the warranty intact.
- Pro: The flat trigger improves accuracy over the standard P320 curved trigger, especially for shooters with smaller hands.
- Pro: Modular grip lets you swap frames for carry or competition without buying a whole new pistol.
- Con: The 10-round magazine capacity is lower than the standard 17-round P320 mags, which may be a drawback for shooters in unrestricted states.
- Con: The slide is heavy due to the full-length steel construction, making it slightly slower to cycle for shooters who prefer lighter reciprocating mass.
Comparison: SIG P320 XFULL vs Zev Technologies OZ9 vs Agency Arms AOS
| Feature | SIG P320 XFULL CMP | Zev Technologies OZ9 | Agency Arms AOS |
|---|---|---|---|
| Caliber | 9mm | 9mm | 9mm |
| Barrel Length | 3.9 inches | 4.0 inches | 4.0 inches |
| Capacity | 10 rounds | 17 rounds | 17 rounds |
| Optics Ready | Yes (RMR/Romeo1Pro) | Yes (RMR) | Yes (RMR) |
| Trigger | Flat, 4.5-5.5 lb | Flat, 3.5 lb | Flat, 4 lb |
| Price | $947.81 | $1,895 | $2,100 |
| Warranty | Lifetime | Limited lifetime | 1 year |
The SIG P320 XFULL offers a lower price point and a proven military pedigree, while the Zev OZ9 and Agency AOS are premium aftermarket builds with lighter triggers and higher magazine capacities. For the shooter who wants a reliable, optics-ready competition gun without the custom shop price tag, the SIG is the better value.
FAQ
What does 'CMP OR' mean in the model name?
CMP stands for 'Competition'—this is the model designed for the U.S. Army’s competition shooting trials. OR means 'Optics Ready,' so the slide is pre-milled for a red dot sight.
Will this fit my existing P320 holster?
Yes, the XFULL uses the same P320 full-size grip module dimensions as the standard P320. It fits holsters designed for the P320 Full or P320 XFull models. Check your holster maker’s compatibility list to be sure.
What red dot sights are compatible with the factory cut?
The slide is cut for the SIG Sauer Romeo1Pro and Trijicon RMR (standard footprint). It also accepts the Holosun 507C and 508T with an adapter plate (not included).
Can I use standard P320 17-round magazines in this gun?
Yes, the XFULL accepts all standard P320 magazines, including 17-round and 21-round models. The 10-round magazine is included for compliance in restricted states, but you can swap to higher capacity mags where legal.
Ready to Buy?
Order the SIG 320XF9MOD10 P320 9mm 3.9 10R CMP OR BLK today and get a factory-tuned competition pistol with optics-ready slide and flat trigger.
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1-2 business days
- ✅ 30-day returns
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Last updated: April 2026