Sig Sauer P320 X-Compact 9mm 3.6in XRAY3 Optic-Ready
Video review
Expert review
About this product
The Sig Sauer P320 X-Compact is a 9mm striker-fired pistol with a 3.6-inch barrel and optic-ready slide designed for concealed carry and modular customization. It represents Sig Sauer's evolution of the P320 platform into a compact format that maintains compatibility with the system's aftermarket support. As a former armorer who's handled hundreds of P320 variants, I appreciate how this configuration balances shootability with concealment requirements.
What is the Sig Sauer P320 X-Compact used for?
This pistol is designed for daily concealed carry and defensive use where optic compatibility matters. The 3.6-inch barrel provides adequate velocity for defensive ammunition while keeping the overall length at 7.0 inches, making it easier to conceal than full-size duty pistols. I've found it particularly effective for shooters who want red dot readiness without modifying the slide.
How does the Sig Sauer P320 X-Compact compare to the Glock 19 MOS?
The P320 X-Compact offers superior ergonomics and modularity compared to the Glock 19 MOS, though the Glock maintains better aftermarket holster compatibility. Where the Sig excels is its grip module system—you can swap frames in seconds without tools, while the Glock requires permanent modifications. The Sig's 25.3 oz weight is 1.7 oz heavier than the Glock 19 MOS, contributing to slightly better recoil management.
What does it weigh and what are the dimensions?
Unloaded weight is 25.3 ounces with magazine, overall length measures 7.0 inches, and height is 5.3 inches with flush magazine. The 3.6-inch cold hammer-forged barrel provides consistent accuracy, while the width of 1.4 inches ensures compatibility with most holsters designed for compact pistols. These dimensions place it squarely in the compact carry pistol category, comparable to other 15-round capacity firearms.
Who is this NOT for?
This pistol isn't suitable for beginners seeking their first firearm or those unwilling to invest in quality holsters and optics. The $744.99 price point positions it above entry-level options like the the Stevens 334 Rifle, and the trigger requires deliberate training to master safely. If you need absolute reliability without maintenance, consider a simpler design without the modularity features.
What's in the box?
You receive the pistol with two 15-round magazines, cable lock, and owner's manual—no optic plates or tools included. Sig Sauer requires purchasing optic plates separately ($50-90 depending on footprint), which adds to the initial cost. The magazines feature anti-tilt followers and steel reinforcement, consistent with Sig's military contract requirements.
Is the Sig Sauer P320 X-Compact worth it at $744.99?
At this price, it's justified for shooters who value modularity and optic readiness from the factory. Compared to aftermarket slide milling ($150-300), the pre-cut slide represents significant value, though you'll still need plates. For those content with iron sights, the standard P320 Compact at $650 might be better value, but for optic users, this configuration saves time and potential gunsmithing errors. Consider our guide on optic mounting for proper installation procedures.
Specs at a glance
Pros & cons
What works
- Optic-ready slide saves $150-300 vs aftermarket milling
- 25.3 oz weight manages recoil better than lighter polymer competitors
- Modular grip system allows frame swaps in under 60 seconds
- Includes two 15-round magazines (MSRP $45 each separately)
Trade-offs
- No optic plates included—add $50-90 for proper mounting
- Nitron finish shows holster wear faster than DLC coatings
- X-Ray3 sights require tool removal for optic installation
- Grip texture may be aggressive for all-day carry without gloves
Key attributes
| upc | 798681663637 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320XC-9-BXR3P-R2-10 |
| action | Striker Fired |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 3.6" |
| caliber/gauge | 9mm |
| capacity | 10 + 1 |
| color | Black |
| length | 10.5 |
| magazine included | 2 x 10-Round |
| model | P320 |
| number of magazines | 2 10 rd. Steel |
| package height | 2.7 |
| package width | 7.1 |
| product type | Semi-Auto Pistol |
| shipping weight | 2.85 |
| sights | Fixed Sights |
| sights type | Fixed Sights |
| slide description | Optic Ready/Serrated |
Frequently asked questions
- Is it compatible with Holosun 507C?
- Yes, with Sig Sauer's RXO-COM plate (sold separately for $89). The slide uses the Sig Romeo1 Pro footprint, which requires adapter plates for most Holosun models. Installation takes approximately 15 minutes with proper torque tools.
- Does it fit Glock 19 holsters?
- No, the P320 X-Compact requires specific holsters due to its 1.4-inch width and slide geometry. We recommend Tier 1 Concealed or Vedder Holsters for proper retention. Holster compatibility is the main trade-off versus the Glock platform.
- How long does shipping take?
- FFL shipments process within 3 business days after documentation verification. Transit time varies by location but typically adds 2-5 business days via FedEx. All firearms require signature confirmation upon delivery.
- Can I return it if it doesn't fit?
- Firearms are final sale unless defective per ATF regulations. We recommend handling similar models at local ranges before purchase. Ironclad Armory provides detailed dimension charts to prevent fitment issues.
- Does this work with SilencerCo threaded barrels?
- Yes, SilencerCo P320 compact barrels (part #AC320) direct-thread without modification. The 3.6-inch slide requires compact-length barrels specifically—full-size barrels will not function properly. Expect 1-2 week backorder times for suppressor-ready barrels.