Description
Enjoy using a slide-mounted reflex sight without needing suppressor height iron sights. The factory-installed ROMEO-X PRO optic sits incredibly low to the sig p320 compact slide so you can enjoy co-witness with the included standard height iron sights, giving you a consistent, familiar sight picture.
SIG P320 Carry/Compact 9mm 3.9″ Slide Assembly with ROMEO-X PRO
If you are looking for the gold standard in modularity, the P320 complete upper assembly in the Compact / XCarry (3.9″) configuration is the industry’s most versatile choice. Whether you are building a custom firearm from a Firearm Control Unit (FCU) or upgrading your current sidearm, this SIG Sauer P320 compact slide delivers the perfect balance of concealment and ballistic performance.
Available in both professional Black and tactical Coyote Brown, this 3.9-inch upper is designed to drop onto any Compact or Carry-sized grip module. For those seeking a slightly shorter profile, it also serves as a premium alternative to the SIG P320 X Compact slide, offering a longer sight radius while maintaining an easy-to-conceal footprint.
Optic-Ready Precision: ROMEO-X PRO Integrated
The centerpiece of this assembly is the factory-installed ROMEO-X PRO red dot. As a SIG Sauer P320 slide optic ready unit, it eliminates the guesswork of mounting hardware. The ROMEO-X PRO is inspired by the military-grade MIL-SPEC optics used by elite forces, featuring a rugged 7075 aluminum housing and a low deck height that allows for a seamless co-witness with your iron sights.
This SIG P320 3.9″ slide optic ready system is engineered for:
- Rapid Target Acquisition: The crisp red dot reticle ensures you stay on target under stress.
- Duty-Grade Durability: Finished in a resilient Nitron (Black) or PVD (Coyote Brown).
- Side-Loading Battery: Change your battery without removing the optic or losing your zero.
Technical Specifications & Compatibility
This P320 compact slide is a “plug-and-play” solution. It comes fully assembled with internal firing components, a 3.9″ barrel, and the recoil spring assembly.
| Feature | Specification |
| Model Fit | P320 Compact, Carry, XCarry, M18 |
| Slide Length | 3.9 Inches |
| Finish Options | Black (Nitron) or Coyote Brown (PVD) |
| Optic Included | ROMEO-X PRO (Pre-Installed & Zeroed) |
| Caliber | 9mm Luger |
| Sights | XRAY3 Day/Night Suppressor Height Sights |
Why Choose the SIG Sauer P320 Compact Slide?
The SIG Sauer P320 compact slide in the 3.9″ variant is the preferred choice for law enforcement and civilian CCW permit holders alike. It provides enough barrel length to maximize 9mm muzzle velocity while remaining short enough to prevent “printing” through clothing. Compared to the SIG P320 X Compact slide, the 3.9″ version offers a slightly softer recoil impulse, making it ideal for high-volume training sessions.
SIG P320 Compact 3.9″ Slide Assembly | ROMEO-X PRO Optic Ready
SIG Sauer P320 Compact 3.9 inch upper Assembly in Coyote Brown with ROMEO-X PRO Red Dot Optic. Upgrade to a P320 complete slide assembly. 3.9″ Compact/XCarry size, optic-ready with ROMEO-X PRO. Available in Black & Coyote Brown. Order the ultimate P320 compact slide today.
P320 Carry/Compact 9mm Slide Features:
- ROMEO-X PRO optic installed
- XRAY3 Day/Night sights
- Durable Cerakote finish
For use with:
-Standard 9mm, 3.9″ non-threaded, or 4.6″ threaded barrels (not included).
-P320 Compact (non-X series) and Full size & carry (X and non-X series) grip modules.
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