If you’ve got a Sig Sauer P320 RX (the Classic version with the Romeo 1 cut) and you’ve upgraded to a Romeo 1 Pro red dot, you’ve probably noticed the footprint doesn’t quite match up. This steel mount from the kit solves that exact headache. It lets you securely fit your Romeo 1 Pro to that original Romeo 1 slide cut without any extra machining or adapter plates that add height. The result is a low, solid mount that keeps your optic right where it should be, shot after shot.
Will this fit my gun?
- Sig Sauer P320 RX (Classic version) — factory slide cut for Romeo 1
- Other P320 slides cut specifically for the Romeo 1 direct-mount footprint
- Works with or without the factory steel shroud on the Romeo 1 Pro
- Does not fit standard P320 slides without the Romeo 1 cut
Key features
- Machined from billet steel — strong enough to handle daily range use and competition
- Black oxide finish — resists corrosion and keeps a low-profile look on your slide
- Raised recoil lugs — lock the optic in place and help prevent shifting under recoil
- Rear notch co-witness — the Romeo 1 Pro’s rear notch lines up with a .400″ tall front sight (sold separately), giving you a backup sight picture
Install difficulty: 2 out of 5
This is a straightforward swap. You’ll need a Torx driver (usually T10 or T15 depending on your optic screws) and a little thread locker (blue Loctite is fine). If you’ve ever swapped an optic or mount before, you can handle this in about 10 minutes. No gunsmithing required. We’ve got a quick install video on the product page if you want to see the steps before you start.
Frequently asked questions
Will this mount work with a Romeo 1 (not Pro)?
No — this mount is specifically designed to adapt the Romeo 1 Pro to a Romeo 1 cut slide. If you’re running a standard Romeo 1, you don’t need this mount.
Do I need to remove the factory shroud from my Romeo 1 Pro?
Not at all. The mount is designed to work with or without the steel shroud. If you prefer the extra protection, leave it on. If you want a lower profile, take it off. Either way, the mount fits.
What front sight do I need for the co-witness?
You’ll want a .400″ tall front sight (not included). That will line up with the rear notch on the Romeo 1 Pro. Check with your favorite sight maker — just make sure it’s for the P320 dovetail.
We ship these mounts out fast from our shop, usually within one business day. And like everything we sell, it’s backed by our straightforward warranty. If you’ve got a problem, give us a call — we’ll make it right.
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