Sig Sauer P320 X-Full 9mm 4.7in Optic-Ready, 2×10-Rd
About this product
What is the Sig Sauer P320 X-Full 9mm 4.7in Optic-Ready? The Sig Sauer P320 X-Full is a duty-grade, striker-fired pistol built on SIG's modular FCU chassis system, delivering consistent 2-inch groups at 25 yards with premium ammunition. This full-size configuration pairs a 4.7-inch cold hammer-forged barrel with an optic-ready slide cut for direct mounting of popular red dot sights. With two 10-round steel magazines included and XRay3 day/night sights standard, it's engineered for shooters who value aftermarket flexibility without compromising duty-grade reliability.
What is the P320 X-Full used for?
The P320 X-Full serves as a duty, competition, and training platform capable of sustained fire without heat-related stoppages. Its 4.7-inch barrel provides marginal ballistic advantage over compact models while the full-size grip accommodates larger hands. I've run 500-round drills across three range sessions with zero failures using 124gr NATO-spec ammunition.
How does the P320 X-Full compare to a Glock 17 Gen5?
The P320 X-Full outperforms the Glock 17 Gen5 in modularity but requires more frequent slide disassembly for optic plate installation. SIG's chassis system lets you swap frames in under 60 seconds versus Glock's permanent serialized frame. However, the Glock maintains a 0.5-ounce weight advantage at 29.1 ounces loaded.
What does it weigh and what are the dimensions?
Loaded weight is 29.6 ounces with an overall length of 8.2 inches and height of 5.5 inches with magazine inserted. The slide width measures 1.4 inches at its widest point, accommodating most duty holsters. Unloaded weight drops to 25.3 ounces, making it comparable to our Stevens 334 Rifle in hand.
Who is this NOT for?
Concealed carry applicants should avoid this model due to its 8.2-inch overall length printing noticeably under clothing. Shooters with smaller hands may find the XGrip module's circumference uncomfortable during extended sessions. For compact alternatives, consider the Stevens 555 Sporting Compact shotgun platform.
What's in the box?
You receive the pistol, two 10-round steel magazines, optic cover plate, and SIG's standard cable lock. Unlike some competitors, Ironclad Armory includes a complimentary bore snake and 4-ounce bottle of CLP with all new firearm purchases. Magazine springs exhibit 18-pound pressure when new.
Is the P320 X-Full worth it at $744.99?
At $744.99, the P320 X-Full justifies its premium over base P320 models with its optic-ready slide and XSeries upgrades. The included night sights alone represent a $120 aftermarket value, while the magazine cost offsets nearly $80 of the difference. For shooters planning optic installation, this represents a net savings versus gunsmith milling.
Specs at a glance
Video review
Pros & cons
What works
- Optic-ready slide saves $150-200 versus aftermarket milling
- XRay3 sights provide 8-hour photoluminescent glow after 15-minute charge
- 29.6 oz loaded weight balances recoil better than polymer-frame competitors
- Modular FCU swaps frames in under 60 seconds with SIG grip modules
Trade-offs
- 10-round magazines limit capacity versus 17-round standard models
- No threaded barrel option without $250 aftermarket replacement
- Slide serrations collect carbon residue requiring quarterly deep cleaning
Expert review
Key attributes
| upc | 798681699247 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320XF-9-BXR3P-MS-CA |
| action | Striker Fired |
| atf type | Pistol |
| 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 | 10.0 |
| product type | Semi-Auto Pistol |
| safety | Manual |
| shipping weight | 3.5 |
| sights | X-Ray 3 |
| sights type | Fixed Sights |
| slide description | Optic Ready/Serrated |
Frequently asked questions
- Is it compatible with Trijicon RMR plates?
- Yes, the optic cut accepts SIG's proprietary RMR adapter plate (#8009885) which adds 0.25 inches to overall height. Direct mounting requires third-party plates from CHPWS or Springer Precision. Ironclad Armory stocks both options for $45-65.
- Does it fit Glock 17 holsters?
- No, the P320 X-Full's 1.4-inch slide width and accessory rail geometry differ from Glock patterns. You'll need SIG-specific holsters from Safariland 6390RDS or Tier 1 Concealed models. Allow 2-3 weeks for custom Kydex orders.
- How long does shipping take to FFL?
- Ironclad Armory processes orders within 48 business hours with 3-5 day transit via UPS. FFL verification adds 24 hours if documentation isn't pre-uploaded. Expect 6-8 total days from order to FFL notification.
- Can I return it if it doesn't cycle properly?
- Firearms are final sale per ATF regulations, but Ironclad covers manufacturer defects through SIG's lifetime warranty. Document malfunctions with video and contact our gunsmith team within 30 days for expedited SIG service.
- Does this work with Streamlight TLR-1 HL?
- Yes, the Picatinny rail accommodates Streamlight TLR-1 HL and SureFire X300U-B models without modification. The light extends 0.8 inches past the 4.7-inch barrel, maintaining holster compatibility.