Description
P365 9MM 3.1″ SLIDE ASSEMBLY, ROMEO-X COMPACT, COYOTE BROWN
The Sig 365 slide allows you to enjoy using a slide-mounted reflex sight without needing suppressor-height iron sights. The factory-installed ROMEO-X COMPACT optic sits incredibly low to the slide so you can enjoy co-witness with the included standard height iron sights, giving you a consistent, familiar sight picture. This feature enhances your experience with the SIG 365 slide.
Factory replacement 3.1″ 9MM slide for the P365X. Compatible with all P365 9mm models and configurations with the following accompanying items: P365/P365X 3.1″ barrel, and recoil assembly. With the SIG 365 slide, you get enhanced performance and versatility for your optic needs.
sig 365 slide
This is a complete slide assembly, including all internal slide parts, and front and rear XRAY3 Day/Night sights. It includes a robust design for the Sig 365 slide, though barrels and recoil spring assemblies are sold separately.
2 MOA Red Dot / 32 MOA Circle – ROMEO-X COMPACT
**Note** Does not include a rear sight plate.

P365 9MM 3.1″ SLIDE Specifications
| Model | P365, P365X |
|---|---|
| Caliber | 9mm Luger |
| Color | Coyote Brown |
| Weight | 9.2 oz [262 g] |
| Application | Self-Defense, Target Shooting, Concealed Carry, Everyday Carry (EDC), Competition Shooting, Law Enforcement / Military, Tactical, Range |
| Loaded Chamber Indicator | No |
| Barrel Included | No |
| Recoil Assembly Included | No |
| Barrel Length | 3.1 in [78.74 mm] |
| Sights | ROMEO-X COMPACT w/ XRAY3 Day/Night Sights |
| Optic Ready | Yes |
| RX Footprint | COMPACT (Shield RMS-c) |
| Electro-Optic Installed | Yes |
| Center Dot Size | 2 MOA Red Dot / 32 MOA Circle |
| Pistol Size | Micro-Compact |
| Slide Finish | Cerakote |
| Slide Material | Stainless Steel |
| Integrated Compensator | No |
SIG P365 optic-ready slide
The term compact most often refers to the size of a semi-automatic handgun. A compact handgun is built to be smaller than a so-called “full-size” handgun and is usually intended for concealed carry use.
These models have a barrel length between 3.5 and 4.5 inches, and in some cases, feature a smaller grip and lower magazine capacity, making them versatile for different uses, including for slide models like the Sig 365.
Why Choose This Slide Assembly?
- Precision Fit: Designed by SIG SAUER for seamless integration with P365 platforms, the SIG 365 slide ensures compatibility.
- Enhanced Target Acquisition: The ROMEO-X Compact optic offers rapid sight alignment with a low-profile mount.
- Durability Meets Style: Coyote Brown Cerakote resists wear while adding a distinctive tactical look.
- Versatile Compatibility: Works with standard P365/P365X holsters and accessories.
Quick Specs Summary
- Slide Length: 3.1″
- Finish: Coyote Brown Cerakote
- Optic: ROMEO-X Compact (RMSc footprint)
- Sights: XRAY3 Day/Night
- Compatibility: P365, P365X, and works perfectly with the Sig 365 slide setup.
FAQs
- Will this fit my P365XL? YES, thanks to the flexible design of the Sig 365 slide.
- Is the barrel inclusive? NO
- What holsters are compatible? P365 series holsters
Key Features of SIG P365 Slide Assemblies
- Slide Lengths: Most common is the 3.1″ slide for standard P365 and P365X models. The versatility of these sizes is complemented by the Sig 365 slide capabilities.
- Optic Compatibility:
- ROMEO-X Compact: Factory-installed red dot with RMSc footprint.
- SIG-LOC™ Optic Ready: Enhanced mounting system for durability and zero retention.
- Finish Options:
- Black Nitron: Classic tactical look.
- Coyote Brown Cerakote: Rugged and distinctive.
- Stainless Steel: Functional and corrosion-resistant.
- Sight Systems:
- XRAY3 Day/Night Sights: Standard on most factory slides.
- Co-witness iron sights: Available with ROMEO-X models.
- Aftermarket Variants:
- Zaffiri Precision ZPS.2: RMS cut, aggressive slide serrations, custom Cerakote finishes for options like the Sig 365 slide.
- True Precision & Live Free Armory: Optic-ready, stylized cuts, and performance upgrades.
Comparison Chart: SIG P365 Slide Assemblies
| Slide Assembly | Optic Included | Finish | Compatibility | MSRP | Unique Features |
|---|---|---|---|---|---|
| P365 3.1″ ROMEO-X Compact (Coyote Brown) | ROMEO-X Compact | Coyote Brown Cerakote | P365, P365X | $649.99 | Co-witness sights, RMSc footprint |
| P365 3.1″ ROMEO-X Compact (Black) | ROMEO-X Compact | Black Nitron | P365, P365X | $649.99 | Same features, tactical black finish |
| P365X 3.1″ Optic Ready (Black) | None | Black Nitron | P365, P365X | $349.99 | Optic-ready cut, no optic included |
| Zaffiri Precision ZPS.2 | None | Custom Cerakote | P365 | ~$399 | Aggressive slide cuts, billet steel |
| Live Free Armory LF365 Elite | None | Cerakote | P365 | ~$429 | Edgy serrations, RMS footprint |





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