The Sig Sauer P320 X-Series slide assembly with 4.7" barrel and integrated Romeo1Pro optic is a purpose-built upper end for shooters who want a modern, optic-ready platform. This stainless steel slide in Coyote Brown finish pairs with a 9mm Luger chamber to deliver the reliability Sig is known for, plus the advantage of factory-mounted red-dot compatibility. Whether you're upgrading an existing P320 frame or building out a complete pistol, this X-Series assembly gives you a refined, contemporary shooting system without the guesswork of aftermarket integration.
The 4.7" barrel length sits in the sweet spot for most shooters—long enough for solid velocity and sight radius, compact enough for practical carry and handling. Pairing it with an installed Romeo1Pro means your optic is already zeroed and aligned at the factory, cutting out the trial-and-error of aftermarket mounting. The Coyote Brown stainless finish is both practical in the field and visually distinctive, resisting corrosion while blending into neutral outdoor environments.
This is a slide assembly only—you'll need a compatible P320 frame, grip module, and magazine to complete a functional pistol. Verify frame compatibility before ordering. The X-Series line represents Sig's modern take on the modular P320 platform, combining precision manufacturing with the kind of straightforward design that works hard and stays reliable through thousands of rounds.
| Manufacturer | Sig Sauer |
| Model | P320 X-Series Slide Assembly |
| Caliber | 9mm Luger |
| Barrel Length | 4.7" |
| Slide Material | Stainless Steel |
| Finish | Coyote Brown |
| Optic System | Romeo1Pro (integrated) |
| Configuration | Slide assembly only (frame/grip sold separately) |
This is a Sig Sauer P320 X-Series slide assembly designed for X-Series compatible frames. Verify your frame or grip module is X-Series spec before ordering. Sig's modularity is a strength, but mixing generations or specs can cause fit issues.
Yes. The Romeo1Pro is factory-installed on this assembly. As with any optic, you may want to confirm zero with your intended ammunition and setup, but factory assembly means proper mounting and alignment out of the box.
This is a slide assembly only. You'll need a compatible P320 X-Series frame or grip module, a magazine, and a firing pin assembly (or frame that includes one) to make a complete, functional pistol.
Coyote Brown is a PVD (Physical Vapor Deposition) finish applied to stainless steel, providing corrosion resistance and a neutral tan color that works well in outdoor environments. PVD is more durable than paint but will show wear with heavy use—that's part of its character.
Sig Sauer
