Optics ready plates for Sig P320 models with Pro Cut & RMR holes

The Sig Sauer P320 family includes several optics-ready slides that combine a Pro Cut pattern with additional RMR screw holes. These are often seen on newer X-Series and Pro-style models where the slide is cut for a DeltaPoint Pro-type footprint but also drilled for direct RMR mounting.

This category gathers optics ready plates specifically for Sig P320 models with Pro Cut & RMR holes. All plates here are intended for slides that have the original DPP-style Pro Cut plus extra RMR screw holes in front of the rear sight.

How Pro Cut & RMR holes work on your P320

On these slides, the rear sight usually remains in its own dovetail behind the optic cut. When you remove the factory cover plate, the rear sight stays in place and you can mount a low-profile adapter plate for your red dot.

• Plates that use the original Pro Cut (DPP-style) footprint: Most high-quality adapter plates still index on the factory DPP cut, using its borders and pins to absorb recoil. The additional RMR holes in the slide remain unused or are only used as extra screw locations, depending on the plate design.
• Why we recommend using a plate instead of direct RMR mounting: Mounting an RMR directly into the two slide holes sends recoil impulse into only two screws. A dedicated adapter plate spreads the stress across the whole footprint, pins and side walls, providing a more secure setup and better long-term durability.

If your P320 slide has the Pro Cut but does not have extra RMR holes (only the standard DPP-style cut), you’ll find matching plates here instead: Optics Ready plates for Sig P320 with Pro Cut.

Slides that lose the rear sight with the cover plate

Some other P320 optics-ready variants (for example many M17/M18, Legion and RXP-style slides) use a cover plate that includes the rear sight. When you remove that plate, you lose your rear sight completely. For those models you will need different adapter plates – often with an integrated rear sight or a new rear dovetail. All such plates are grouped here: Optics ready plates for Sig P320 models with removable rear sight.

What about older P320 optic cuts?

Older Sig P320 optic cuts (for example early P320-XFIVE slides made before 2018) use a different geometry that you can usually recognize by a straight, non-rounded end of the optic cut. For those slides you’ll need dedicated plates listed here: Optics ready plates for Sig P320-XFIVE.

Plates available for major red dot footprints

Our adapter plates for Pro Cut & RMR hole slides support a wide range of popular red dot 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 XCarry, XFull, XFive Legion, AXG-style models, M17/M18, etc.).

Precision fit for Pro Cut & RMR-hole P320 slides

Each plate in this collection is CNC-machined for P320 slides that combine the Pro Cut pattern with extra RMR holes. You’ll find:

• Low-profile plates that keep the optic as close to the slide as possible for a lower bore axis feel.
• Competition-focused options that maximize window exposure and speed of target acquisition.
• Robust designs that spread recoil across the whole footprint, enhancing durability compared to direct-screw-only mounting.

This allows you to build a carry, duty or competition setup that stays secure under recoil and holds zero while using the full potential of the Pro Cut.

Iron sights & backup sighting options

Most Pro Cut & RMR-hole slides keep the rear sight in a separate dovetail behind the optic cut, making co-witnessing easier. If you need different height or style, check our sights for Sig P320 optics-ready models, including suppressor-height sets, fiber optic fronts and tritium night sights.

Have a non-OR or different-cut P320?

If your Sig P320 is not optics-ready from the factory, or does not use the Pro Cut & RMR-hole configuration, you can still mount a red dot using other solutions. Explore our red dot mounts for non-OR Sig P320 pistols or browse all optic adapter plates for Sig Sauer models.

Not sure if your slide has Pro Cut & RMR holes?

If you’re unsure which exact P320 slide you have or whether it belongs to this category, just contact us. Share your full model name and a photo of the slide cut (from above and from the side), and we’ll help you choose the right adapter plate.