Description
P226 9MM 4.4″ SLIDE ASSEMBLY, ROMEO-X PRO, BLACK
Upgrade your SIG Sauer P226 with the factory-engineered 9MM 4.4″ Slide Assembly featuring the ROMEO-X PRO red dot optic — a precision-built solution for tactical shooters, competitive marksmen, and everyday carriers. This complete slide assembly comes pre-mounted with the ROMEO-X PRO, offering a crisp 3 MOA dot, motion-activated illumination, and co-witness capability with the included X-RAY3 Day/Night Sights.
Built from stainless steel and finished in Black Nitron, this slide offers durability, corrosion resistance, and aggressive styling. Whether you’re building a red-dot-ready rig or replacing a worn slide, this OEM upgrade ensures perfect fitment with SIG factory barrels and recoil systems — no gunsmithing required.
The ROMEO-X PRO is zeroed from the factory, saving you setup time and ensuring immediate performance. With its low-profile design and rugged aluminum housing, it’s built to withstand harsh conditions while delivering fast target acquisition.
SIG P226 optics-ready slide
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 slide so you can still use the equipped XRAY3 Day/Night Sights when the optic is not in use, giving you a consistent, familiar sight picture.
This factory replacement, P226 RXP X series Stainless Steel slide assembly accommodates our 4.4” barrel (not included).
Barrel Compatibility: 9MM
Finish: Black
Includes factory replacement TORX wrenches made to specifically fit the ROMEO-X.
- (1) T-10 wrench
- (1) T-6 wrench
- (1) CR1632 Battery
P226 ROMEO-X PRO vs PRO-CUT vs Legion Slides
| Feature | P226 ROMEO-X PRO Slide | P226 PRO-CUT Slide Assembly | P226 Legion Slide (Complete Pistol) |
|---|---|---|---|
| Optic Included | ROMEO-X PRO (factory mounted) | Optic-ready only | Optic-ready only (DPP footprint) |
| Optic Footprint | ROMEO-X PRO (RMR footprint) | RMR, ROMEO1PRO, DeltaPoint Pro | DeltaPoint Pro only |
| Iron Sights | X-RAY3 Day/Night (co-witnessed) | X-RAY3 Day/Night | X-RAY3 Day/Night |
| Slide Cuts | Minimal (optic cut only) | PRO-CUT reliefs (stylized/lightened) | Front/rear serrations only |
| Finish | Black Nitron | Black Nitron | Legion Gray PVD |
| Material | Stainless Steel | Stainless Steel | Stainless Steel |
| Included Components | Slide + ROMEO-X PRO + Sights | Slide + Sights (no optic) | Full pistol (slide, frame, barrel, etc.) |
| Price Range | ~$699 MSRP | ~$359–$429 | ~$1,200+ (complete pistol) |
| Best For | Turnkey red dot upgrade | Custom optic builds, stylized look | Premium full pistol builds |
| Warranty | SIG OEM | SIG OEM | SIG OEM |
Factory-Installed ROMEO-X PRO on a Precision SIG P226 Slide
Upgrade your SIG P226 with a complete slide assembly that’s ready to perform — featuring the ROMEO-X PRO red dot optic, X-RAY3 sights, and a rugged Black Nitron finish. You might also love the Pro-cut sig 9mm slide
Key Benefits
- Factory-mounted ROMEO-X PRO red dot optic (3 MOA)
- Co-witnessed X-RAY3 Day/Night Sights
- Drop-in fit for SIG P226 9mm full-size frames
- Durable Black Nitron finish on stainless steel
- Zeroed from the factory — ready to shoot
P226 9MM 4.4″ Slide Assembly – ROMEO-X PRO, Black
The P226 9MM 4.4″ Slide Assembly with ROMEO-X PRO is SIG Sauer’s ultimate turnkey upgrade for red dot shooters. This factory slide comes pre-mounted with the ROMEO-X PRO, a rugged 3 MOA red dot optic built on the RMR footprint with motion-activated illumination, side-loading battery, and a low-profile design that co-witnesses perfectly with the included X-RAY3 Day/Night Sights.
SIG Sauer engineers this slide from stainless steel and finishes it in Black Nitron to deliver durability, corrosion resistance, and seamless integration with your P226 9mm frame. Whether you’re upgrading for tactical use, competition, or EDC, this optic-ready slide delivers factory precision and performance — no gunsmithing required.
Comes with?
- Complete slide assembly
- Factory-mounted ROMEO-X PRO optic
- X-RAY3 Day/Night Sights
- Optic cover plate (if applicable)
Compatibility
- ✅ Fits: SIG P226 9mm full-size frames
- ❌ Does NOT fit: P226 .40 S&W or .357 SIG
FAQs
Q: Is the ROMEO-X PRO zeroed from the factory? A: Yes — it’s pre-zeroed for most standard P226 configurations.
Q: Can I use a threaded barrel? A: Yes — the slide is compatible with SIG factory threaded and non-threaded barrels.
Q: Will this fit my P226 Legion? A: Yes, if it’s a 9mm full-size frame. However, the finish and styling will differ.
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