Optics ready plates for Sig P320-XFIVE [2014 - 2018]

The first generations of Sig Sauer P320-XFIVE (2014–2018) came with one of the earliest factory optics-ready slide cuts in the P320 family. This cut differs from later X-Series, Legion and Pro Cut slides, so using a plate made specifically for these older X-FIVE models is crucial for a secure fit and reliable zero.

In this category, you’ll find optics ready plates made for the older P320-XFIVE optics cut. They allow you to run modern red dots on your original X-FIVE without milling the slide or guessing which adapter will work.

How to recognise the older P320-XFIVE optics cut

To make sure you are in the right category, check these details on your slide:

• Your pistol is marked as P320-XFIVE and comes from the early production years (roughly 2014–2018).
• The optics cut has a straight ending at the front (perpendicular to the barrel) rather than a rounded/arched front edge.
• The slide is factory optics-ready, but does not have the later “Pro Cut with RMR holes” layout.

If your X-FIVE slide has the newer Pro Cut style (often with an arched front to the cut or additional RMR-threaded holes from factory), you’ll need plates from these categories instead:

• Optics Ready plates for Sig P320 with Pro Cut
• Optics Ready plates for Sig P320 with Pro Cut and RMR holes
• Optics ready plates for Sig P320 models with removable rear sight

Plates available for major red dot footprints

The plates in this category are designed to convert the older P320-XFIVE optics cut to popular modern footprints, including (plate-dependent):

• Trijicon RMR / SRO
• Leupold DeltaPoint Pro / Romeo1Pro-type footprints
• 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. In the description you will usually see explicit mention of the older P320-XFIVE (pre-2018) optics cut, so you can confirm you are choosing the right plate.

Precision fit for early P320-XFIVE competition slides

Each adapter plate here is CNC-machined specifically for the early P320-XFIVE optics-ready slides. You’ll find options such as:

• Low-profile plates that keep the optic as close to the bore as possible for faster transitions and a more natural point of aim.
• Plates optimised for competition use, maximising window exposure and speed of target acquisition.
• Solutions that maintain or restore a usable sight picture when changing from the original cover plate to a red dot.

This allows you to modernise your classic X-FIVE setup for sport or range use while maintaining a solid mount and dependable zero retention.

Iron sights & backup sighting options

If you want a traditional sight picture or a backup to your red dot, take a look at our iron sights for Sig P320 optics-ready models. You’ll find suppressor-height sets for co-witness, fiber optic fronts and tritium night sights. On slides where the original rear sight is removed together with the plate, choose adapters that reintroduce a rear notch or that are compatible with backup sights.

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 (other P320 variants, P226, P229, etc.)? Browse our full range of optic adapter plates for Sig Sauer models.

Not sure which plate fits?

If you’re unsure whether your slide is one of the older P320-XFIVE optics cuts or a newer Pro Cut/Legion variant, just contact us. Share your exact model name and a clear photo of the slide cut, and we’ll help you choose the correct adapter plate for your pistol and your red dot.