Apex Optic Mount for Romeo 1 Pro to P320 RX Classic
$69.00
Machined from billet steel with a black oxide finish, this Apex Optic Mount lets you securely mount a Romeo 1 Pro to your Sig Sauer P320 RX Classic slide, with raised recoil lugs and a co-witness rear notch for reliable performance.
Ships to all 50 states. Available nationwide.
If you’ve got a Sig Sauer P320 RX Classic and a Romeo 1 Pro sitting in a drawer because they don’t fit together, this Apex Optic Mount for Romeo 1 Pro to P320 RX Classic is the answer you’ve been looking for. Machined from a solid billet of steel with a black oxide finish, this mount bridges the gap between the older RX slide cut and the newer Romeo 1 Pro footprint. It’s a simple, rugged solution that lets you run that upgraded optic without swapping slides or sending your gun off for milling. Per manufacturer specs, the raised recoil lugs lock the optic tight, and the rear notch on the Romeo 1 Pro co-witnesses with your factory iron sights. At $60, this mount is a practical investment in keeping your P320 shooting the way it should.
| Manufacturer | Apex Tactical Specialties |
|---|---|
| Model | Apex Optic Mount for Romeo 1 Pro to P320 RX Classic |
| Material | Billet steel |
| Compatibility | Sig Sauer P320 RX Classic (original cut for Romeo 1) and other P320 slides cut for Romeo 1 direct mount; Romeo 1 Pro optic |
| Finish | Black oxide |
| Weight | 0.5 oz (per manufacturer specs) |
| Condition | New |
Key Features
- Billet Steel Construction — Stronger than aluminum or polymer, this mount resists flex and holds zero even under heavy recoil. Why it matters: Your optic stays dead-on round after round, season after season.
- Black Oxide Finish — A classic corrosion-resistant coating that also reduces glare. Why it matters: No rust worries in humid conditions, and no reflections that could give away your position in low light.
- Raised Recoil Lugs — These lugs lock into the optic’s recesses, taking the shear force off the screws. Why it matters: Your mounting screws don’t loosen over time, and the optic stays put when you need it most.
- Compatible with Romeo 1 Pro Steel Shroud — Works with or without the factory-provided shroud. Why it matters: You can run the optic fully armored for duty use or stripped down for competition weight savings—your choice.
- Rear Notch Co-Witness — The mount’s design allows the Romeo 1 Pro’s rear notch to align with your front sight. Why it matters: If your dot goes down, you can still make accurate shots using your iron sights without removing the optic.
Who It’s For
This mount is for the shooter who owns a first-generation P320 RX Classic—the one with the factory-milled Romeo 1 cut—and wants to upgrade to the Romeo 1 Pro without buying a whole new slide. It’s also for the traditionalist who prefers steel over aluminum, who doesn’t trust polymer adapters, and who wants a mount that feels like it was part of the original design. If you value durability and a clean co-witness, this is your part.
Pros and Cons
- Pros: Solid steel construction, precise fit, allows use of Romeo 1 Pro shroud, co-witness capability, affordable price for a specialty adapter.
- Cons: Adds a slight height to the optic (about 0.050 inches), which may require a slight cheek weld adjustment for some shooters. Not compatible with P320 slides cut for the Delta Point Pro or other footprints—only Romeo 1/Romeo 1 Pro cuts.
Comparison vs. Competitors
| Feature | Apex Optic Mount | Zev Technologies P320 Optic Plate | Agency Arms P320 Optic System |
|---|---|---|---|
| Material | Billet steel | 7075 aluminum | 416 stainless steel |
| Finish | Black oxide | Black anodized | Black DLC |
| Compatibility | P320 RX Classic (Romeo 1 cut) | P320 with RMR/Holosun 407C/507C cut | P320 with Agency cut |
| Co-witness | Yes (rear notch) | No (requires separate suppressor sights) | Yes (integrated notch) |
| Price | $60 | $85 | $110 |
The Apex mount offers the best value for shooters sticking with the Romeo 1 Pro on an RX Classic slide. Zev’s plate is aluminum and doesn’t co-witness, while Agency’s system is pricier and requires their specific slide cut. For the price of a quality holster, the Apex gets you running.
FAQ
Will this mount work on a P320 M17 or M18?
No. The P320 M17 and M18 have a different slide cut designed for the Delta Point Pro or Romeo 2 footprint. This mount is specifically for the P320 RX Classic and other slides cut for the original Romeo 1 optic.
Do I need to remove the factory rear sight to install this mount?
No. The Apex mount replaces the factory rear sight assembly, but it includes a rear notch that co-witnesses with your front sight. You do not need to remove the front sight.
Will the Romeo 1 Pro fit with the steel shroud installed?
Yes. Per Apex Tactical, the mount is designed to work with or without the factory-provided steel shroud for the Romeo 1 Pro. If you run the shroud, the mount still provides a secure fit.
Does this mount include mounting screws?
No. The mount itself does not include screws. You will need to use the screws that came with your Romeo 1 Pro. If you lost them, standard M3 x 0.5 x 8mm screws will work.
Trust and Service
- ✓ Nationwide delivery to all 50 states
- ✓ Ships within 1-2 business days
- ✓ 30-day return policy
- ✓ Secure checkout
Last updated: April 2026
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