Sig Sauer P320 XFive SXG 9mm 5″ Stainless — 3x21rd Mags
About this product
The Sig Sauer P320 XFive SXG 9mm 5″ Stainless is a full-size, steel-framed competition pistol engineered for USPSA Open division and tactical games where weight and magazine capacity directly impact balance and scoring performance. This model represents Sig Sauer's direct response to the custom-shop demand for a production-legal pistol that bridges the gap between duty reliability and competition refinement. The inclusion of three 21-round steel magazines is a deliberate configuration for stage-optimized reload planning versus the more common two-magazine kit found on most imported pistols.
What is the Sig Sauer P320 XFive SXG used for?
This pistol is engineered primarily for competitive shooting in USPSA Limited, Open, and Carry Optics divisions where its 49.5-ounce stainless frame and 21-round magazines provide direct advantages. The slide's optics-ready PRO footprint allows immediate mounting of Trijicon RMR or Leupold DeltaPoint Pro optics, eliminating the need and cost of custom machining for competition-ready builds. Its 5-inch bull barrel and full-length guide rod system are weighted to reduce muzzle flip by approximately 30% compared to polymer-framed P320 models, translating to faster sight picture recovery during timed strings of fire.
How does the Sig Sauer P320 XFive compare to the Sig Sauer XFive Legion?
The P320 XFive SXG offers superior trigger reset distance control while the Legion version delivers marginally better slide-to-frame fit straight from the factory. The SXG's stainless steel frame weighs 10.2 ounces more than the Legion's tungsten-infused polymer frame, giving the SXG a decisive 22% forward weight bias that directly controls muzzle climb during rapid fire at 7 to 10 yards. Where the Legion excels for shooters adding weight via optics and compensators, the SXG provides that base balance without requiring aftermarket tungsten guide rods or brass backstraps that often void factory warranties.
What does it weigh and what are the dimensions?
The P320 XFive SXG weighs 49.5 ounces (1,403 grams) unloaded and measures 8.5 inches in overall length with a 5-inch barrel that provides a 7.8-inch sight radius between the fiber optic front and adjustable rear posts. Its slide width is 1.4 inches at the optic plate, requiring a holster designed specifically for XFive models—standard P320 holsters will not interface correctly due to the extended dust cover and slide profile. The grip circumference with the included medium backstrap measures 5.75 inches, which is comparable to our Stevens 334 Rifle pistol grip when wearing medium shooting gloves.
Who is this NOT for?
This is not a concealed carry pistol—its 49.5-ounce weight and 8.5-inch length make proper concealment impractical under anything but the heaviest outer layers. Shooters seeking a lightweight, compact firearm for defensive use should examine the modularity of standard P320 frames rather than this competition-specific platform. The SXG's steel frame also makes it incompatible with standard P320 holsters, requiring a $120-190 investment in a competition-ready rig from Black Scorpion or Ghost Holsters before it's field-ready for timed events.
What's in the box?
The factory packaging includes three 21-round steel magazines, a Sig Sauer optic cover plate for the PRO footprint, a 12mm socket for sight adjustments, and the pistol with the medium backstrap installed. It does not include the small or large backstrap variations found in standard P320 kits—additional sizes must be sourced separately at $45-65 through Sig Sauer's authorized parts network. Compared to the case included with our Stevens 555 Sporting O/U, this packaging prioritizes component separation over foam preservation.
Is the Sig Sauer P320 XFive SXG worth it at $1884.99?
At $1884.99, this pistol represents a 15-20% premium over the polymer-framed Legion variant that must be justified by the shooter's specific sensitivity to frame flex and recoil impulse management. The value proposition crystallizes when considering that achieving similar weight distribution in a polymer frame requires $300-500 in aftermarket tungsten guide rods, brass grip modules, and custom trigger work—investments that often void the factory warranty and can't be resold as an integrated package. For competition shooters whose match placings consistently hinge on 2-3% faster splits and transitions, the SXG's intrinsic balance provides measurable return at this price point.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 49.5 oz — 10.2 oz heavier than polymer P320 frames for 30% reduced muzzle flip
- Includes three 21-round steel magazines — provides 63 rounds total for stage planning without immediate reload investment
- 5-inch bull barrel provides 7.8-inch sight radius — outdistances standard 4.7-inch P320 models by 26%
- Stainless steel frame eliminates polymer flex — maintains zero with optics under sustained rapid fire better than infused-polymer frames
Trade-offs
- No included backstrap alternatives — requires $45-65 purchase for size variations through Sig Sauer parts network
- Incompatible with standard P320 holsters — mandates $120-190 investment in competition-specific holsters before use
- Bead-blast finish shows holster wear quickly — visible abrasion marks appear after 15-20 draws from Kydex
- No factory-applied stippling on front strap — aggressive grip requires $80-120 stippling service or grip tape
Expert review
Key attributes
| upc | 798681695379 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320SXG5-9-STAS |
| action | Semi-Auto |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 5'' |
| caliber/gauge | 9mm |
| capacity | 21+1-Round |
| color | Stainless |
| length | 8.5'' |
| magazine included | 3 x 21-Round |
| model | P320 XFive SXG |
| number of magazines | 3 |
| package height | 2.8 |
| package width | 9.6 |
| product type | Striker Fired |
| safety | Thumb |
| shipping weight | 5.1 |
| sights | Adjustable |
| sights type | FIBER OPTIC |
| slide description | Optic Ready/Serrated |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is it compatible with standard P320 magazines?
- Yes, it accepts all P320-compatible magazines, but only the included 21-round steel magazines will seat flush with the extended SXG grip frame. Standard 17-round magazines will leave a 0.75-inch gap at the baseplate that affects grip purchase during competition reloads. Order additional magazines from Sig Sauer directly or through Ironclad Armory's parts portal.
- Does it fit in a standard P320 holster?
- No, the extended dust cover and slide profile require a holster specifically designed for XFive models. Holsters from Black Scorpion Gear (Model B-EX5) or Red Hill Tactical (Competition Double Layer) typically require 5-7 business days for custom molding. Fitment testing with polymer P320 holsters risks damaging the retention mechanisms due to the 0.2-inch wider slide profile.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes firearms shipments within 1 business day, with transit times of 2-6 business days depending on your FFL dealer's proximity to our Montana facility. All shipments require FFL verification through our portal before processing—have your dealer's license ready during checkout. Expedited shipping via UPS 2nd Day Air adds $45 but guarantees arrival within 3 business days total.
- Can I return it after shooting?
- No, Ironclad Armory does not accept returns on firearms that have been fired, per ATF regulations regarding used firearm transfers. Unfired firearms may be returned within 14 days with a 15% restocking fee and original packaging. All warranty claims must be processed directly through Sig Sauer's warranty department, which typically provides 3-5 day turnaround for non-critical repairs.
- Does this work with Sig Romeo1 Pro optics?
- Yes, the PRO/DeltaPoint Pro footprint directly accepts Sig Romeo1 Pro, Trijicon RMR, and Leupold DeltaPoint Pro optics without adapter plates. The factory-provided cover plate uses Torx T10 fasteners pre-torqued to 15 inch-pounds—use a calibrated torque driver when mounting optics to avoid stripping the aluminum threads. Aftermarket plates for Holosun 507C require a $65 adapter from CHPWS that adds 0.08 inches of height.