Sig Sauer P320 X-Series Slide Assembly 3.6" Barrel 9mm Luger Coyote Brown Stainless Steel Romeo1Pro

The Sig Sauer P320 X-Series slide assembly is a factory OEM replacement slide that lets you rebuild or customize your modular P320 platform. This 3.6" barrel slide in coyote brown stainless steel comes already outfitted with a Romeo1Pro optic mounted and ready to run, plus suppressor-height X-ray night sights for fast target acquisition in low light. It's designed to pair with X-Compact and Sub-Compact grip modules, making it an ideal choice for shooters building a compact, optics-ready 9mm for concealed carry, duty, or range work.

The P320 platform's modular design means you can swap slides, barrels, and grip modules to tune your gun to your needs—and this assembly handles the complexity for you. Coming pre-fitted with the Romeo1Pro (Sig's compact red-dot sight) saves setup time and ensures proper mounting out of the box. The coyote brown Nitron finish on stainless steel resists corrosion and wears well, and the suppressor-height sights sit tall enough to cowitness with the mounted optic if you run backup iron sights.

If you're running a P320 X-Compact or Sub-Compact frame and want to modernize with an optic-ready slide without sourcing parts separately, this assembly delivers a complete, tested solution from the factory. Whether you're setting up a new gun or upgrading an existing platform, you get a known-good component stack proven in Sig's own quality control.

Key Features

• Factory Sig Sauer OEM replacement slide assembly
• Romeo1Pro red-dot optic pre-mounted and ready to shoot
• Suppressor-height X-ray night sights for low-light target acquisition
• Coyote brown Nitron finish on stainless steel for corrosion resistance
• 3.6" barrel in 9mm Luger
• Compatible with P320 X-Compact and Sub-Compact grip modules
• Modular platform allows grip and slide swaps

Specifications

Frequently Asked Questions

What P320 grip modules does this slide assembly fit?

This slide assembly is designed for Sig Sauer P320 X-Compact and Sub-Compact grip modules only. Make sure you have one of these frame sizes before ordering.

Does it come with the Romeo1Pro optic already installed?

Yes. The Romeo1Pro red-dot sight comes pre-mounted on the slide and ready to use out of the box—no additional optic purchase or installation required.

What sights are included?

The slide includes Sig's suppressor-height X-ray night sights. These sit tall enough to cowitness with the mounted Romeo1Pro if you decide to add backup iron sights later.

Is this slide compatible with .40 S&W or other calibers?

No. This assembly is chambered in 9mm Luger only and is not compatible with other P320 calibers.