Optics ready plates for Sig P320-XFULL

The Sig Sauer P320-XFULL is a full-size X-Series pistol with a factory optics-ready slide. Most XFULL slides use the modern PRO / DPP-type cut (often called “R2”), sometimes with additional RMR mounting holes. Choosing the right adapter plate ensures a secure mount and proper zero for your red dot.

This category gathers optics ready plates designed specifically for Sig P320-XFULL optics-ready models. Whether your slide has only the standard PRO / DPP cut or also auxiliary RMR holes, the plates here interface with the factory footprint and provide the correct pattern for your chosen optic.

How the P320-XFULL optics cut works

On the P320-XFULL, the optics-ready slide is supplied with a cover or rear-sight plate from the factory. When you remove this plate to install a red dot, you expose the PRO / DPP-style cut underneath. Many shooters are tempted to bolt an RMR directly to the extra holes in the slide, but a dedicated adapter plate is usually the safer choice:

• Plates in this category clamp to the factory cut and spread recoil forces across the full footprint and pins, not just a pair of screws.
• They provide the correct height and alignment for your chosen optic, helping maintain zero and protecting the slide threads.
• Some plates add or preserve a rear sight solution for those who want a co-witness or backup irons.

Plates available for major red dot footprints

Depending on the exact plate, you’ll find support for many popular red dot footprints, including:

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

Always check the individual product description for the exact optic footprint supported by each plate. All items in this category are filtered for use with the optics-ready P320-XFULL slide.

Precision fit for Sig P320-XFULL

Each plate is CNC-machined for the P320 X-Series PRO / DPP-style slide cut and is chosen with XFULL users in mind. In this collection you’ll find:

• Low-profile adapter plates that keep the red dot as close to the bore as possible.
• Plates with integrated rear sights or rear-notch solutions for a clear backup sight picture.
• Competition-focused plates that maximize window exposure and speed of target acquisition.

This lets you tune your P320-XFULL for carry, duty or competition while keeping a robust mount and reliable zero retention.

Iron sights & backup sighting options

If you want to maintain a traditional sight picture or add a backup to your red dot, explore our iron sights for Sig P320 optics-ready models. You’ll find suppressor-height sets for co-witnessing, fiber optic fronts, and tritium night sights. On slides where removing the plate also removes the rear sight, 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 slide is not optics-ready from the factory, you can still mount a red dot using dovetail or dedicated mounting solutions. See our red dot mounts for non-OR Sig P320 pistols here.

Need plates for other Sig models?

Looking for adapter plates for a different Sig pistol (P320 M17/M18, X-Five Legion, P365 series, etc.)? Browse our full range of optic adapter plates for Sig Sauer models.

Not sure which plate fits?

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