Sig Sauer P320 X-Five Legion 9mm 5″ — Legion Gray
Pros & cons
What works
- Tungsten-infused TXG grip weighs 12.2 oz — adds mass forward of the hand to reduce muzzle flip by an estimated 30%.
- 5-inch match-grade bull barrel provides 8.5-inch sight radius for enhanced mechanical precision.
- Optic-ready slide accepts DeltaPoint Pro/Romeo1 Pro optics without aftermarket milling — saves $150+ in gunsmithing.
- Includes two 17-round steel magazines — one with a weighted competition basepad for division compliance.
Trade-offs
- No optic plate included — requires separate $40-$70 purchase from Sig Sauer for your specific red dot.
- Heavy 43.5 oz unloaded weight makes it unsuitable for all-day carry or holsters designed for lighter duty pistols.
- Competition-oriented trigger has a 4.5 lb pull weight — heavier than tuned hammer-fired options like the CZ Shadow 2's 3.5 lb single-action.
Video review
Expert review
Specs at a glance
About this product
The Sig Sauer P320 X-Five Legion 9mm 5″ is a competition-ready, full-size striker-fired pistol engineered with a tungsten-infused grip and match-grade barrel to deliver precision in demanding shooting environments. This variant builds upon Sig's modular P320 platform with specific weight-forward design and optic-ready architecture for competitive shooters. As a Legion Series model, it includes Sig's commitment to performance-oriented construction and includes upgrades over the standard P320 X-Five model.
What is the Sig Sauer P320 X-Five Legion used for?
The P320 X-Five Legion is designed primarily for USPSA, IDPA, and other pistol competition divisions where full-size, optic-ready 9mm platforms dominate. Its 5-inch barrel and added tungsten weight deliver a stable, flat-shooting experience ideal for fast, accurate follow-up shots under pressure. While capable for range training, its competition-focused trigger and sight configuration make it a specialized tool.
How does the Sig Sauer P320 X-Five Legion compare to a CZ Shadow 2?
The Legion offers a 5.3 oz heavier overall weight and a striker-fired system, while the hammer-fired CZ Shadow 2 often has a smoother, lighter trigger pull out of the box. For shooters transitioning from duty-style striker guns like the Glock 34, the Legion's manual of arms will feel more familiar, but the CZ Shadow 2 typically provides better single-action break characteristics for pure precision. The Legion's modular FCU design allows for easier caliber and size changes compared to the CZ's fixed-frame system.
What does it weigh and what are the dimensions?
Unloaded, the pistol weighs 43.5 oz (1,233 grams), with dimensions of 8.5 inches in overall length, 5.5 inches in height, and 1.4 inches in width. The TXG grip module itself contains over 12 oz of tungsten-infused polymer, shifting the center of mass forward to reduce muzzle flip by an estimated 30% compared to standard polymer grips. This weight is distributed to aid in recoil management during rapid-fire strings.
Who is this NOT for?
This pistol is not suited for concealed carry due to its size and weight, nor is it ideal as a first handgun for a novice due to its competition-oriented trigger and higher cost. Shooters seeking a lightweight backpacking or trail gun should look at compact options like the Stevens 334 Rifle in .308 Win for a more balanced field package. Those needing a simple, rugged defensive handgun will find better value in standard duty models.
What's in the box?
The package includes the complete pistol, two 17-round steel magazines with witness holes, Dawson Precision fiber-optic front and adjustable blacked-out rear sights, and a Legion Series coin. Notably, it does not include an optic plate; you must order the specific plate for your red dot (DeltaPoint Pro or Romeo1 Pro footprint) separately from Sig Sauer. One magazine is flush-fit, the other features a weighted basepad for competition compliance.
Is the Sig Sauer P320 X-Five Legion worth it at $1038.99?
At just under $1,040, it's a justifiable investment for a dedicated competitive shooter needing an optic-ready platform with proven weight-forward balance. Compared to building a Glock 34 MOS with aftermarket tungsten grips and a trigger job, the Legion arrives as a complete, tested system. For a general-purpose range gun, the Stevens 555 Sporting 20 Gauge offers more versatility at a fraction of the cost.
Key attributes
| upc | 798681618293 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320X5-9-LEGION-R2-10 |
| action | Semi-Auto |
| atf type | Pistol |
| barrel length | 5'' |
| caliber/gauge | 9mm |
| capacity | 10-Round |
| color | GREY |
| length | 8.5'' |
| magazine included | 2 x 10-Round |
| model | P320 X-Five |
| number of magazines | 3 |
| package height | 3.0 |
| package width | 9.8 |
| product type | Striker Fired |
| shipping weight | 4.7 |
| sights | Adjustable |
| sights type | FIBER OPTIC |
| slide description | Serrated |
Frequently asked questions
- Is the slide compatible with Trijicon RMR optics?
- No, not directly. The slide is cut for the DeltaPoint Pro and Sig Romeo1 Pro footprint. You will need an adapter plate from companies like CHPWS or Springer Precision to mount an RMR, which adds approximately 0.20 inches of height above the bore and costs around $50-$80.
- Does it fit in a standard P320 full-size holster?
- Yes, with a caveat. The slide and frame dimensions align with full-size P320/X-Five models, but holsters must have an open bottom or sufficient length to accommodate the 5-inch barrel. Duty-style holsters from Safariland (Model 6390RDS) and competition models from Red Hill Tactical are confirmed compatible.
- How long does shipping take to an FFL?
- Ironclad Armory processes orders within 1-2 business days. Transit time via FedEx or UPS Ground is typically 3-5 business days to the continental U.S. Total time from order to your FFL notification is usually 5-7 business days, excluding FFL processing delays.
- Can I swap the grip module for a compact size?
- Yes, the serialized Fire Control Unit (FCU) is modular and will drop into any P320 grip module. However, using a shorter compact or carry-size grip will create a gap where the 5-inch bull barrel extends past the dust cover, and the magazine will no longer seat flush without an adapter or shorter magazine.
- Does this work with a suppressor?
- It can, but requires modification. The 5-inch bull barrel does not have factory threading. You must purchase a separate, drop-in threaded barrel from Sig Sauer or a third-party like Bar-Sto, which costs approximately $180-$250 and may require minor fitting for optimal lockup.