A full-size 9mm service-pistol comparison between the Sig Sauer P320 and Smith & Wesson M&P 9 for shoppers narrowing duty-size options.
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| Specification | Sig Sauer P220 Nitron Full Size | Smith & Wesson M&P9 M2.0 Optics Ready |
|---|---|---|
| Type | Pistol: Semi-Auto | Pistol: Semi-Auto |
| Caliber | .45 ACP | 9mm Luger |
| Action | Double Action | Double Action Only (Striker Fired) |
| Capacity | 8+1 | 17+1 |
| Barrel Length | 4.4" | 4.25" |
| Overall Length | 7.7" | 7.5" |
| Weight | 30.4 oz | 24.7 oz |
| Finish | Matte Black Nitron | Matte Black Stainless Steel Slide |
| Stock / Grip | Polymer Grips | Black Polymer Frame w/ S, M, ML, L Inserts |
| Sights | Front: SIGLITE, Rear: Fixed SIGLITE | Tall White 3-Dot Sights |
| Safety | Decocker | Passive Trigger Safety, Striker Block Safety |
| Receiver | Aluminum Alloy | Polymer w/ Picatinny-Style Rail |
| Magazines | 2 | 2 |
| MSRP | $1,299.99 | $699 |
| UPC | 798681437238 | 022188889703 |
| Model Code | — | 13564 |
Rows marked with have different values
CA Approved
Flat Face Trigger, Ambidextrous Slide Release, Optics Ready, Accepts CT, Delta Pnt, Trijicon
A direct pair makes sense once you already know you want a larger 9mm platform and need to decide whether the remaining differences in price, dimensions, and features are enough to change your choice.
Start with the highlighted rows, then look at total size, weight, capacity, and pricing together instead of isolating one number at a time.
If this matchup still feels too narrow or you are not sure these are your two best candidates, widen the shortlist with a broader full-size or top-rated page before returning to compare.
Use these guides, FAQs, and category pages if you want more context before you commit to this matchup as your final shortlist.
Answers to common 9mm shopping questions, including why 9mm is so popular, how to think about size, and how to narrow down the right 9mm handgun.
Answers to common questions about how to compare handguns, what to focus on first, and how to keep side-by-side comparisons useful.
