Sig Sauer P320-MAX 2.0 9mm 5 in ROMEO3MAX (4)21rd
Video review
Expert review
About this product
The Sig Sauer P320-MAX 2.0 9mm is a race-ready, competition-oriented 9mm pistol built specifically for USPSA Carry Optics and similar action shooting sports. Developed with input from Sig Sauer Pro shooter Max Michel, it centers on a purpose-driven chassis system designed for repeatable accuracy over typical duty or concealed carry applications. This configuration prioritizes speed, muzzle stability, and reload efficiency above all else.
What is the Sig Sauer P320-MAX 2.0 used for?
The Sig Sauer P320-MAX 2.0 is used exclusively for competitive shooting sports like USPSA Carry Optics, Steel Challenge, and other outlaw-style action pistol matches. Its 43.6-ounce tungsten-infused frame and 5-inch match-grade bull barrel are tuned to control recoil for faster follow-up shot accuracy, a legal requirement in its division. This isn't a duty gun or a concealed carry piece; it's a specialized tool built to win on the clock under competitive rule sets, which require specific optics and magazine capacity compliance.
How does the Sig Sauer P320-MAX 2.0 compare to a Springfield Armory Hellcat Pro?
The Sig Sauer P320-MAX 2.0 is categorically better for competitive shooting, whereas the Springfield Armory Hellcat Pro is a superior choice for concealed carry. The P320-MAX 2.0 weighs almost twice as much at 43.6 ounces versus the Hellcat Pro's 21 ounces, using its mass for recoil control versus the Hellcat's light weight for comfortable all-day carry. The 5-inch bull barrel on the Sig delivers inherently tighter mechanical accuracy and a longer sight radius, critical for hitting small steel plates at 25 yards, a distance where the Hellcat's 3.7-inch barrel shows its limitations.
What does it weigh and what are the dimensions?
Loaded with one of its four included 21-round magazines, the P320-MAX 2.0 weighs 43.6 ounces or 1235 grams, and its overall length measures 8.25 inches with a barrel length of exactly 5.0 inches. The extended magazine adds a functional grip length of approximately 6.5 inches for a full firing-hand purchase, and the sight distance—from the rear of the ROMEO3MAX window to the front lens—is 6.2 inches. This combination creates a balance point directly under the optic for minimal muzzle rise during rapid strings of fire.
Who is this NOT for?
The P320-MAX 2.0 is not for shooters considering a first pistol for home defense or concealed carry, nor does it handle the roles of a Stevens 334 rifle for long-range precision. Its sheer weight and optic-centric configuration make it impractical for daily concealed wear, and its competition-specific controls and lack of a manual safety render it inappropriate for untrained household access. Furthermore, its price point of $1351.99 is a significant investment that only pays dividends under the stress of a match timer.
What's in the box?
The box contains the complete pistol with the ROMEO3MAX 6 MOA optic pre-zeroed, four factory 21-round 9mm magazines, a standard polymer case, a lock, and the factory owner's manual. Unlike basic firearms like Stevens 555 shotguns, Sig Sauer does not ship with supplementary tools, aftermarket grip panels, or a cleaning kit, expecting the owner to already possess a specialized field maintenance kit for match-level servicing. The four magazines provide 84 rounds of on-person capacity, sufficient for most competitive stages.
Is the Sig Sauer P320-MAX 2.0 worth it at $1351.99?
For a serious competitor seeking a factory race gun that’s legal for major USPSA Carry Optics matches without modification, the P320-MAX 2.0 is absolutely worth its $1351.99 price. The cost factors in the ROMEO3MAX optic (typically a $450+ unit alone), the proprietary tungsten-infused TXG grip module ($300+), and the barrel hand-fitted to the slide for precision. Compared to sourcing these parts and paying a gunsmith for a build, this price represents a complete, competition-legal, and warranty-backed package that removes guesswork and installation time.
Specs at a glance
Pros & cons
What works
- 43.6 oz tungsten-infused TXG frame reduces muzzle flip by approximately 40% versus a standard polymer P320 module
- Includes four 21-round magazines for 84 rounds of competition-ready capacity out of the box
- ROMEO3MAX 6 MOA optic is pre-zeroed and competition-legal, saving $450+ over separate purchase and gunsmith mounting
Trade-offs
- No external manual safety — not ideal for households with untrained users or those uncomfortable with striker-fired operation
- Massive 8.25-inch overall length makes it incompatible with most standard pistol safes and range bags designed for duty-sized firearms
- Requires a $200-$300 holster system from brands like GX Products or Red Hill Tactical for proper competition belt mounting
Key attributes
| upc | 798681704798 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320X5-9-MAXM2 |
| action | Semi-Auto |
| barrel length | 5" |
| caliber/gauge | 9mm |
| capacity | 21 |
| color | Black |
| length | 8.25'' |
| magazine included | 4 x 21-Round |
| 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 |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is the ROMEO3MAX optic pre-installed and zeroed?
- Yes, the ROMEO3MAX 6 MOA optic is factory-installed and pre-zeroed for a 25-yard point of impact with standard 124-grain 9mm ammunition. The optic is mounted to the slide via the proprietary SIG mounting system, which is legal for Carry Optics division. It is recommended to verify zero at your own range, typically a 15-minute process requiring a single 21-round magazine for confirmation.
- Does this model have an external manual safety?
- No, this specific competition configuration does not include an external manual safety lever, which is standard for the majority of USPSA Carry Optics builds. The pistol operates with the standard P320 fire control unit (FCU) and a consistent 2.9-pound flat trigger pull. This design reduces administrative handling steps during timed reloads and complies with division rules requiring a 'fire-ready' start condition.
- Can I use aftermarket P320 magazines?
- Yes, any standard Sig Sauer P320 9mm magazine with a capacity of up to 21 rounds is mechanically compatible with this pistol. However, for major competition use, we only recommend using factory OEM magazines from Sig Sauer, as the extended 21-round baseplates included are designed specifically for the grip angle and length of the TXG module. Expect a factory magazine to cost $45-$55 each through authorized distributors like Brownells.
- How many rounds are included with purchase?
- The pistol ships with four (4) factory Sig Sauer 21-round magazines for a total of 84 rounds of on-deck capacity before reloading, which is the maximum allowed in many competition divisions. It does not include any live ammunition, as per standard firearms shipping regulations. The purchase of four separate 21-round magazines would typically cost over $200 if sourced individually, making their inclusion a significant portion of the kit's value.