Optics ready plates for Sig P320 XFIVE [DH3]

The Sig Sauer P320 XFIVE DH3 is a competition-focused X-Series pistol built on the XFIVE Legion platform, featuring an optics-ready slide and suppressor-height X-RAY3 sights straight from the factory. It uses the modern Romeo1Pro / DeltaPoint Pro-style optic cut with additional RMR / Holosun screw holes, making it very flexible for different red dots.

In this category, you’ll find optics-ready plates made specifically for the Sig P320 XFIVE DH3. All plates here are designed around the DH3 slide: Romeo1Pro / DPP cut with RMR holes, and a rear sight that stays in its own dovetail when you remove the cover plate. That means your rear sight can remain in place while you mount a red dot.

Know your P320 XFIVE DH3 optics cut

The XFIVE DH3 belongs to the newest generation of P320 optics-ready slides:

• Romeo1Pro / Deltapoint Pro style cut with curved front: The DH3 slide is factory cut for the larger DPP / Romeo1Pro footprint.
• Extra RMR / Holosun holes: Newer P320 slides like the XFIVE DH3 also have additional threaded holes for RMR-pattern optics. These give you the option to run RMR-footprint dots using a plate or filler adapter.
• Rear sight in a separate dovetail: On the XFIVE DH3 the rear sight is not part of the cover plate, so it does not disappear when you remove the optics cover. Plates in this category are made to work with that layout and keep your rear sight usable.

While some RMR-footprint optics can be bolted directly to the slide, we strongly recommend using a dedicated adapter or filler plate. A good plate fills the gaps in the cut and adds recoil lugs, so the optic doesn’t rely only on the screws to absorb recoil.

Plates for the most common red dot footprints

Depending on the model, adapter plates in this category support a wide range of popular red dot patterns, including:

• Trijicon RMR / SRO and compatible Holosun 407C / 507C / 507Comp
• Leupold DeltaPoint Pro / Romeo1Pro-type optics
• Shield RMSc
• Holosun K-Series (407K / 507K / EPS Carry)
• Noblex / Vortex Venom
• Aimpoint Acro
• C-More RTS and similar footprints

Always check each product description to confirm the exact combination of XFIVE DH3 slide + optic footprint it supports.

Competition-ready, precise fit for XFIVE DH3

Each plate is CNC-machined specifically for the modern P320 optics-ready slide families, including the XFIVE DH3. In this category you’ll find:

• Low-profile plates that keep the optic as close to the bore as possible for faster transitions.
• Plates focused on maximum window exposure for sport shooting and dynamic stages.
• Heavy-duty options designed to spread recoil forces into the plate body and recoil lugs rather than only into the screws.

This lets you tune your XFIVE DH3 either for competition, intensive training, or general range use while maintaining a secure mount and reliable zero.

Iron sights & co-witness options

Because the P320 XFIVE DH3 keeps its rear sight in a separate dovetail, you don’t lose your irons when you remove the cover plate. With the right plate and optic height, you can often achieve a useful co-witness with the suppressor-height X-RAY3 sights – giving you a clean red dot picture with a robust backup sighting system.

If you’re also looking to upgrade your irons, check our dedicated category for sights for Sig P320 optics-ready models, where you’ll find fiber optic, tritium, and competition-oriented sets.

Need plates for other Sig P320 models?

If you have a different P320 variant (M17/M18, XFIVE Legion, AXG, Spectre, etc.), or an older P320 with the first-generation Romeo1 cut, please use our more general categories such as Optics ready plates for Sig P320 models [all] or optic adapter plates for Sig Sauer models.

Not sure if your slide matches the XFIVE DH3 cut?

If you’re unsure whether your P320 is the XFIVE DH3 variant or which plate fits your red dot, just contact us. Send us the exact model name (and ideally a photo of the slide cut from above), and we’ll help you choose the correct adapter plate for your setup.