Optics ready plates for Sig P320 models [all]

The Sig Sauer P320 family includes a wide range of optics-ready pistols: RX and RXP models, X-Series, Pro Cut slides, as well as M17/M18 and Legion variants. Each of these uses a slightly different slide cut and rear sight layout, so choosing the correct adapter plate is essential.

This category gathers optics ready plates for all factory optics-ready Sig P320 models. Whether your slide keeps the rear sight in a separate dovetail or loses it with the cover plate, you’ll find plates that match your setup and your red dot footprint.

Understand your P320 optics cut & rear sight layout

Before choosing a plate, it helps to know how your specific P320 slide is configured:

• Rear sight behind the optics cut: On some P320 optics-ready slides, the rear sight sits in its own dovetail behind the optic cut. When you remove the cover plate, the rear sight stays in place and you can use a simple low-profile plate for your red dot.
  • You can encounter names such as "Pro Cut" or "Pro Cut with RMR holes" regarding these models. What you need to know is that for both - Pro Cut or Pro Cut with RMR holes models fit the adapters. How so? Because they attach to the original DPP Cut anyway, the RMR holes are there just extra in case you want to risk installing RMR optic directly (not recommended as it gives all the recoild to only two screws instead of transforming it to the plate borders and pins. You can find all matching adapters here:
    • Optics Ready plates for Sig P320 with Pro Cut
    • Optics Ready plates for Sig P320 with Pro Cut and RMR holes
  • By the way, these adapter plates also work with the models that have rear sight integrated in the cover plate (it does not work vice versa though).
• Rear sight integrated in the cover plate: Other P320 models (including many M17/M18, Legion and RXP-style slides) use a cover plate that combines the optic cover and rear sight. When you remove this plate to mount a red dot, the rear sight disappears—here you may prefer a plate with an integrated rear sight or a plate that adds a new rear dovetail. All compatible plates - for models that lose rear sight when you remove the optics ready cover - are listed here: Optics ready plates for Sig P320 models with removable rear sight.
• *There are also older Sig P320 optic cuts for models made before 2018 (e.g. older Sig P320-XFIVE). You can distinguish them foremostly by having straight ending in the optics slide cut. For those you can find matching plates here: Optics ready plates for Sig P320-XFIVE. 

Plates available for major red dot footprints

Our adapter plates support a wide range of popular red dot mounting patterns, including (model-dependent):

• Trijicon RMR / SRO
• Leupold DeltaPoint Pro / Romeo1Pro-type cuts
• Shield RMSc
• Holosun K-Series
• Noblex / Vortex Venom
• Aimpoint Acro
• C-More RTS

Always check the individual product description for the exact combination of slide type + optic footprint it supports (for example: P320 RX, X-Five non-Legion, X-Five Legion, XCarry, XFull R2, M17/M18, etc.).

Precision fit for P320 optics-ready models

Each plate in this collection is CNC-machined specifically for the optics-ready Sig P320 slide families. You’ll find:

• Low-profile adapter plates that sit as close to the slide as possible for a lower bore axis feel.
• Plates with integrated rear sights or rear-dovetail solutions for slides that lose their iron sight when the cover plate is removed.
• Competition-focused plates that maximize window exposure and speed of target acquisition.

This lets you tune your setup for carry, duty, or competition while keeping a secure mount and reliable zero retention.

Iron sights & backup sighting options

If you want a traditional sight picture or a backup to your red dot, we also offer iron sights for Sig P320 optics-ready models, including suppressor-height sets for co-witness, fiber optic fronts, and tritium night sights. On slides that lose the rear sight with the cover plate, look for plates that reintroduce a rear notch or allow mounting a rear sight on the plate itself.

Have a non-OR Sig P320?

If your Sig P320 is not optics-ready from the factory, you can still mount a red dot using dovetail or dedicated mounting solutions. Explore our red dot mounts for non-OR Sig P320 pistols here.

Need plates for other Sig models?

Looking for optics plates for different Sig pistols? Browse our full range of optic adapter plates for Sig Sauer models.

Not sure which plate fits?

If you’re unsure which slide cut you have or which plate matches your optic, just contact us. Share your exact P320 model name (and ideally a photo of the slide cut), and we’ll help you pick the right adapter plate for your setup.