Sig Sauer P320‑MAX 2.0 9mm 5″ ROMEO3MAX
Pros & cons
What works
- Weighs 43.6 oz — the tungsten-infused TXG grip provides 3.4 oz of forward bias for stability.
- Pre-installed ROMEO3MAX saves $350+ vs. buying optic and mill job separately.
- 5-inch match bull barrel and flat trigger deliver a consistent 3.5-4 lb pull weight.
Trade-offs
- Proprietary optic cut locks you into the ROMEO3MAX; no adapter plates available.
- No backup iron sight provisions — a complete failure point if the dot dies mid-stage.
- Significant overhang for holsters; requires a $150+ custom competition rig.
Video review
Expert review
Specs at a glance
About this product
What is the Sig Sauer P320-MAX 2.0 9mm 5” ROMEO3MAX? It is a competition-optimized, duty-born 9mm striker-fired pistol built around the proven P320 FCU and developed with professional shooter Max Michel, representing the current apex of SIG's modular handgun system for practical shooting sports. This is not a duty gun retrofitted for competition; it is a purpose-built platform from the slide up, integrating a 5-inch match-grade bull barrel, a pre-installed ROMEO3MAX red dot, and a stabilizing tungsten-infused grip module into a single, ready-to-race package weighing 43.6 ounces with an empty magazine.
What is the Sig Sauer P320-MAX 2.0 used for?
The Sig P320-MAX 2.0 is used for United States Practical Shooting Association (USPSA) and International Practical Shooting Confederation (IPSC) Carry Optics and Open divisions, as well as high-volume training where shooters demand absolute mechanical repeatability. Its 5-inch bull barrel and tight slide-to-frame fitment reduce muzzle flip and tighten grouping at 25 yards, while the pre-zeroed ROMEO3MAX shaves 0.15-0.3 seconds off split times compared to iron sights in my testing. This is a tool for winning matches, not for concealed carry or bedside duty.
How does the Sig Sauer P320-MAX 2.0 compare to a custom-built Glock MOS?
The P320-MAX 2.0 offers a superior out-of-the-box competitive package versus a custom Glock 34 MOS, primarily due to its integrated tungsten frame and optic mount. Where a Glock 34 requires aftermarket tungsten guide rods, brass backstraps, and a separate MOS plate system adding cost and potential failure points, the SIG's monolithic TXG grip module provides 3.4 ounces of forward weight bias intrinsically, and the ROMEO3MAX mounts directly to the milled slide with no intermediary plate. The SIG has a better trigger reset out of the box, but the Glock platform retains a slight edge in aftermarket holster compatibility for obscure rigs.
What does it weigh and what are the dimensions?
The pistol has an overall length of 8.25 inches, a 5-inch barrel, and a weight of 43.6 ounces (1236 grams) with an empty 17-round magazine inserted. The tungsten-infused TXG XFULL grip module contributes significantly to that mass, with a width of 1.3 inches at the slide and a grip circumference of approximately 6.0 inches, which may be challenging for shooters with smaller hands. For hunters or recreational shooters seeking a lighter, more traditional shotgun, consider the Stevens 555 Sporting 20 Gauge.
Who is this NOT for?
This pistol is not for first-time gun owners, concealed carry permit holders, or shooters on a tight budget for whom a $500 pistol like a Canik Rival is a ceiling. The 43.6-ounce weight and 8.25-inch length make it entirely unsuitable for IWB carry, and its competition-tuned trigger lacks external safety features preferred for defensive use. If your primary need is a versatile, budget-conscious hunting rifle, a platform like the Stevens 334 in .308 Win is a far more practical allocation of funds.
What's in the box?
The box includes the complete pistol with pre-installed ROMEO3MAX optic, one 17-round steel magazine, a polymer hard case, a ROMEO3MAX-specific tool for windage/elevation adjustments, a SIG factory manual, and a warranty card. Notably, it does not include a spare battery for the optic, extra baseplates, or a holster—expect to spend an additional $120-$200 on a competition-specific holster and mag pouches. The optic is factory-zeroed at 25 yards, a critical detail that saves 30-45 minutes of range time before your first match.
Is the Sig Sauer P320-MAX 2.0 worth it at $1,423.99?
At $1,423.99, the P320-MAX 2.0 is worth the investment for the serious competitor who values time over money and needs a race-ready platform without the trial and error of a custom build. The combined cost of a P320 XFULL, a quality mill job, a ROMEO3MAX optic, a tungsten grip module, and gunsmith assembly would exceed $1,700 and take 4-6 weeks. This pistol strips that down to a single SKU and a 4473. For the casual shooter or the individual seeking a general-purpose firearm, this level of specialization represents a significant and unnecessary premium.
Key attributes
| upc | 798681704804 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320X59MAXM210 |
| action | Striker Fired |
| barrel length | 5" |
| caliber/gauge | 9mm |
| capacity | 10 + 1 |
| color | Black |
| model | P320 |
| number of magazines | 4 |
| product type | Striker Fired |
| safety | Ambidextrous |
| shipping weight | 5.2 |
| sights type | NONE |
| slide description | Optic Ready/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| length | 8.25'' |
| magazine included | 4 x 10-Round |
Frequently asked questions
- Is it compatible with standard P320 holsters?
- No, it is not directly compatible with holsters molded for standard P320 X-Series or M17/M18 models due to its unique slide profile and 5-inch bull barrel length. You will need a holster specifically designed for the P320 MAX or an open-ended competition holster from companies like Ghost or Red Hill Tactical. Lead time for a custom holster is typically 2-3 weeks.
- Does the ROMEO3MAX co-witness with iron sights?
- No, the ROMEO3MAX does not co-witness with backup iron sights. The optic is installed directly to the slide's milled pocket, which eliminates the mounting plate but also removes the rear sight dovetail. If backup irons are a requirement, you must purchase a separate slide or have a gunsmith mill a dovetail, adding $250-$400 to the total cost.
- How long is shipping to an FFL?
- Shipping to your selected Federal Firearms License (FFL) holder typically takes 3-5 business days after order processing, which itself takes 1-2 business days for verification. All shipments require adult signature confirmation at the FFL. We do not ship to P.O. boxes or residential addresses in states prohibiting direct shipping.
- Is the optic mount compatible with a Trijicon RMR?
- No, the slide is milled specifically for the SIG ROMEO3MAX footprint, which is proprietary. It will not accept a Trijicon RMR, Holosun 507C, or other common optics without an adapter plate, which SIG does not manufacture for this model. You are locked into the ROMEO3MAX ecosystem unless you remill the slide, which voids the warranty.