Apex Optic Mount for Romeo 1 Pro to P320 RX Classic

The Apex Optic Mount lets you put a Romeo 1 Pro red dot on your Sig Sauer P320 RX Classic slide without buying a new pistol. This mount is a direct-fit adapter, made for shooters who want a reliable sight setup without overpaying for proprietary parts. At $60, it’s a practical way to upgrade your existing P320 to a more modern optic footprint.

Built for durability, not show. This mount is machined from a solid billet of steel, then treated with a Black Oxide finish. That means it resists wear and corrosion from holster use, sweat, or range dirt. The raised recoil lugs are machined into the mount itself — they lock the optic into place against the slide’s movement. You get a repeatable zero that holds up over thousands of rounds, not a flimsy plate that shifts under recoil.

Simple fitment, no extra work. This mount is designed specifically for the Sig Sauer P320 RX pistol slide that was originally cut to accept a Romeo 1 direct mount. It adapts that cut to securely hold the Romeo 1 Pro. You can run it with or without the factory steel shroud that comes with the Romeo 1 Pro — your choice. No filing, no shimming, no gunsmith needed.

• Compatible slides: Sig Sauer P320 RX (Classic version) and any P320 slide cut for direct mounting of the Romeo 1 optic.
• Optic fit: Sig Sauer Romeo 1 Pro red dot sight only. Not for Romeo 1 (original) or other footprints.
• Material: Billet steel with Black Oxide finish.
• Installation: Direct bolt-on using factory screws (not included — reuse your existing optic screws or purchase separately).
• Shroud compatibility: Works with or without the Romeo 1 Pro steel shroud.
• Co-witness: The rear notch on the Romeo 1 Pro aligns with a .400-inch tall front sight (not included). If you want irons as a backup, you’ll need a front sight of that height.

Why buy this mount? If you already own a P320 RX Classic and want to run a Romeo 1 Pro, this is the only steel mount that fits without modification. It’s cheaper than buying a new slide or sending yours out for milling. The steel construction and recoil lugs keep your dot from walking — a common problem with cheaper aluminum mounts. And because it works with the factory shroud, you can keep the protective cover on your optic if you prefer.
</