Optics ready plates for Sig P320 XFIVE [LEGION & SXG]

The Sig Sauer P320 XFIVE line was built for competition – and the XFIVE Legion and SXG models sit at the very top of that family. Both use a factory optics-ready slide with a Romeo1Pro / DeltaPoint Pro-style cut and an adjustable rear sight that is integrated into the cover plate.

In this category, you’ll find optics ready plates made specifically for Sig P320 XFIVE Legion and P320 XFIVE SXG pistols. When you remove the factory cover plate, you also remove the rear sight – these adapter plates are designed to replace that cover and provide a secure mounting interface for your red dot.

How the XFIVE Legion & SXG optics cut works

XFIVE Legion and XFIVE SXG share the same modern optics-ready layout:

• Romeo1Pro / DPP-style footprint: The slide is machined for the Sig “Pro” (R1P/DPP) pattern. Our plates pick up this factory cut so you don’t need any milling or permanent modification.
• Removable rear sight plate: The rear sight sits on the optics cover plate. Once you take it off, you lose the rear sight – so it’s important to choose whether you want a low-profile plate or a plate that reintroduces a rear sight solution.
• Plates tuned for heavy, competition slides: The XFIVE Legion’s tungsten-infused grip module and the all-steel SXG benefit from rigid plates that hold zero under fast string fire and high round counts.

Plate options for popular red dot footprints

The plates in this category support a wide range of competition-proven and carry-ready optics (model-dependent), including:

• Trijicon RMR / RMR HD / SRO
• Holosun 407C / 507C / 507Comp / 508T
• Leupold DeltaPoint Pro / Romeo1Pro-type optics
• Shield RMSc
• Holosun K-Series
• Noblex / Vortex Venom-type footprints
• Aimpoint Acro and similar enclosed optics
• C-More RTS and other competition-oriented dots

Always check the individual product description for the exact optic footprint + XFIVE model combination (XFIVE Legion vs XFIVE SXG) each plate is built for.

Precision plates for Legion & SXG slides

Every plate in this collection is CNC-machined specifically for Sig P320 XFIVE Legion and P320 XFIVE SXG optics-ready slides. You’ll find options such as:

• Ultra low-profile plates that keep the optic as low to the bore as possible for a flat recoil impulse and fast sight tracking.
• Plates with integrated rear sight solutions (or rear-dovetail interfaces) that bring back a backup sight picture after you remove the factory cover plate.
• Competition-optimized plates that maximize window exposure and help with rapid target transitions in IPSC / USPSA-style shooting.

This lets you tune your XFIVE Legion or SXG for carry-optics, open-style setups, or training & range work while keeping a rock-solid mount and reliable zero retention.

Iron sights & backup options

If you want a traditional sight picture or a backup to your red dot, have a look at our iron sights for Sig P320 optics-ready models. Many shooters pair suppressor-height or co-witness rear sights with plates that accept taller front blades, creating a robust backup system for match or duty use.

Using an older XFIVE or a non-OR P320?

If you have an older, pre-2018 Sig P320 XFIVE with the earlier optics cut, please use this dedicated category instead: Optics ready plates for Sig P320-XFIVE [2014–2018].

If your Sig P320 is not optics-ready from the factory, you can still mount a red dot using dovetail and dedicated mounting solutions. Browse 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? Explore our full range of optic adapter plates for Sig Sauer models.

Not sure which plate fits?

If you’re unsure whether you have an XFIVE Legion or SXG, or which plate best matches your optic, just contact us. Send your exact model name and a clear photo of the slide cut from above, and we’ll help you select the right adapter plate for your setup.