Description
The Sig Sauer P320 XTen Full Size is what happens when the most modular pistol platform in production gets chambered in the most powerful cartridge that still fits a semi-auto this size. MAG5 Firearms stocks it with a 5-inch barrel, an optic-ready slide, a beavertail frame with a Picatinny rail and ten rounds of 10mm Auto.
Why the Full-Size Frame Suits 10mm
Ten millimeter recoils hard in a compact gun and merely firmly in a full-size one. The 5-inch slide adds reciprocating mass and moves weight forward, which is why the Sig Sauer P320 XTen Full Size is noticeably easier to shoot fast than shorter 10mm pistols.
The longer barrel also lets heavy hard-cast and bonded loads reach the velocities their makers advertise. Shorter 10mm barrels quietly give that performance back.
Sig Sauer P320 XTen Full Size Slide, Frame and Optic Cut
The slide arrives cut for a red dot, so an optic mounts without milling. On a cartridge where precise placement matters as much as it does with 10mm, that is a functional upgrade rather than a convenience.
A stainless chassis inside a polymer grip module, with a beavertail that lets the hand ride high over the bore, keeps the muzzle flatter than the cartridge would otherwise allow. The Picatinny rail takes a weapon light.
Sig Sauer P320 XTen Full Size Specifications
| Manufacturer | SIG SAUER |
|---|---|
| Model | P320 XTen Full Size |
| Part Number | 320X510BXR3R210 |
| Caliber | 10mm Auto |
| Capacity | 10+1 Rounds |
| Barrel Length | 5 inches |
| Barrel Material | Black Carbon Steel |
| Slide | Black Nitron Stainless, Optic Ready, Serrated |
| Frame | Black Stainless with Beavertail and Picatinny Rail |
| Grip Module | Black Polymer |
| Manual Safety | No |
| Action | Striker Fired |
| UPC | 798681697694 |

Where 10mm Earns Its Keep
Ten millimeter Auto sits between service pistol cartridges and magnum revolver rounds. It drives heavier bullets faster than 45 ACP and penetrates deeper than 9mm, which is why it holds a following among people who hunt, hike or work where large animals are a genuine consideration.
For a trail gun or a woods sidearm, the Sig Sauer P320 XTen Full Size delivers that performance in a familiar semi-automatic package rather than a revolver.
Modularity and the Fire Control Unit
The serialized part on a P320 is the fire control unit, not the frame or slide. That means this pistol can change grip module, slide and barrel later without a second FFL transfer.
No competing platform in this class offers that path, and it is why the P320 family has the aftermarket support it does.
Availability and Transfer
This configuration ships without a manual safety, which most shooters prefer on a striker-fired gun. A manual-safety version is cataloged separately.
MAG5 Firearms is a licensed FFL dealer in Pennsylvania. This pistol ships new in the factory case with magazines and documentation, transferred through your local FFL.
Other Sig Sauer P320 XTen Full Size configurations and 10mm handguns are listed in our handgun catalog. Factory specifications are published by SIG SAUER.
Every Sig Sauer P320 XTen Full Size sold by MAG5 Firearms ships new in the factory packaging with the accessories SIG SAUER includes, and transfers to your chosen FFL. The Sig Sauer P320 XTen Full Size is a regulated firearm and we verify licensing before any order leaves the shop.








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