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The 10mm has always been a capable round, but managing it in a carry-sized pistol has historically meant choosing between a short, snappy gun that's hard to shoot fast or a long-slide pistol that's a pain to pack all day. The P320 XTen Carry Comp sidesteps that tradeoff by building a true compensator directly into the slide itself. This isn't just a ported barrel or a hole cut in the top — SIG machines an actual expansion chamber into the slide just forward of the muzzle, and it works. The result is a pistol that independent reviewers have consistently described as the softest-shooting compact 10mm they've tested, noticeably flatter than a Glock G20 or FN 510 Tactical when running the same loads.
The slide runs equivalent in length to what you'd see on a 4.25-inch P320, but the 3.8-inch bull barrel and integrated comp fill that space efficiently. Overall length is 7.6 inches and the pistol weighs in at 32.3 ounces with a magazine. Two 15-round steel magazines ship with the gun, giving you 15+1 of 10mm on tap — a meaningful capacity advantage over many competing 10mm pistols in this size class. This particular variant (MPN: 320XCA-10-COMP-MS) adds a factory manual safety, which a lot of backcountry carriers appreciate when the pistol is riding in a pack or a shoulder rig all day.
The XSeries flat-faced trigger with a 90-degree break gives you a clean, consistent press, and the XCarry-length grip module was redesigned specifically for the 10mm and .45 ACP frame size. The stippled polymer grip gives you solid purchase even with wet hands. Topping it off, XRAY3 day/night sights come standard — tritium-lit for low-light work, with a large bright front dot that's fast to pick up in any conditions. The optic-ready slide uses the SIG PRO RX footprint, which is also compatible with the Leupold DeltaPoint Pro, giving you plenty of options if you want to run a red dot.
This gun was clearly built with hunters, hikers, and anglers in mind — people who need real stopping power in the field but don't want to haul a full-size pistol. The 10mm's ability to push heavy hard-cast or penetrating projectiles makes it well-regarded for bear country, and the comp makes rapid follow-up shots far more manageable than you'd expect from a barrel this short. The P320 platform's serialized Fire Control Unit means the gun is modular at its core, so grip modules and slide assemblies can be swapped down the road. SIG backs this pistol with their Infinite Guarantee, fully transferable with no receipts or warranty cards required.
Yes, and this is one of the cases where a comp genuinely earns its keep. SIG machines a true expansion chamber into the slide just forward of the muzzle, which redirects propellant gases upward and reduces muzzle rise significantly. The 10mm generates enough pressure to make this design work very well, and hands-on testing from multiple outlets has rated it the softest-shooting compact 10mm compared to pistols like the Glock G20 and FN 510 Tactical. SIG claims roughly a 20 percent reduction in felt recoil, and real-world use backs that up.
The slide on the XTen Comp is equivalent in length to a standard 4.25-inch P320 slide, but that extra space up front is occupied by the integrated expansion chamber rather than additional barrel. The 3.8-inch bull barrel sits inside, with the comp built into the slide around it. This means you get a carry-length overall package without a muzzle device sticking out beyond the slide — it's a clean, integrated design.
The slide uses the SIG PRO RX footprint, which is also compatible with the Leupold DeltaPoint Pro. SIG's own ROMEO2 and Romeo X Pro optics are direct fits, and the platform is also noted as compatible with the Trijicon RMR with a sealing plate. If you plan to run a red dot on a hard-kicking 10mm, make sure to torque your mounting screws properly and re-check them after the first range session.
The standard 320XCA-10-COMP does not include a manual safety. The 320XCA-10-COMP-MS — which is this pistol — adds a factory-installed ambidextrous manual safety. Both versions ship with two 15-round steel magazines and are otherwise mechanically identical. The manual safety version is particularly popular with backcountry carriers who keep the pistol in a pack or shoulder rig for extended periods.
No — the XTen platform uses a larger frame designed around the 10mm and .45 ACP cartridge, so it is not cross-compatible with P320 parts and magazines chambered in 9mm, .357 SIG, or .40 S&W. Only 10mm and .45 ACP compatible P320 components will work with this model. Make sure any accessories, holsters, or spare magazines are specifically listed for the P320 XTEN or the 10mm/.45 ACP frame size.
It's a strong option. The 10mm cartridge can push heavy hard-cast or high-penetration loads that are well-regarded for large predator defense, and the 3.8-inch barrel loses only a modest amount of velocity compared to longer barrels — typically around 50 to 75 fps slower than a 5-inch tube. The compensator makes fast follow-up shots more realistic under stress, and the 15+1 capacity gives you more rounds than most other 10mm pistols in this size range. The manual safety on this variant adds an extra layer of security when the gun is riding in a pack all day.
| UPC | 798681712878 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 320XCA-10-COMP-MS |
| Action | |
| ATF Type | Pistol |
| Barrel Finish | Black |
| Barrel Length | 3.8'' |
| Caliber/Gauge | 10mm |
| Capacity | 15+1-Round |
| Color | Black |
| Length | 7.6'' |
| Magazine Included | 2 x 15-Round |
| Model | |
| Mount Type | Sig PRO RX Footprint |
| Number of Magazines | 2 15 rd. Steel Mags |
| Package Height | 3.0 |
| Package Width | 10.0 |
| Product Type | Semi-Auto Pistol |
| Safety | Manual |
| Shipping Weight | 3.7 |
| Sights | XRAY 3 Day/Night Sights |
| Sights Type | Night Sights |
| Slide Description | Optic Ready/Serrated |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
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