Daniel Defense H9 RDS Adapter Plate 3 Kit

Product Description

The Daniel Defense H9 RDS Adapter Plate 3 Kit (part 28-196-16270) is the C-More standard footprint plate for the DANIEL H9 pistol, machined from stainless steel and supplied with all necessary mounting hardware and an installation tool. It is the plate Daniel Defense assigns to the C-More RTS and STS families, the Sig Sauer Romeo3 series and a group of competition-oriented optics on the same pattern.

The C-More standard footprint is most often found under larger-window competition dots, and plenty of H9 owners arrive with one because the optic came off another pistol. Plate 3 is what makes it land correctly on the H9’s factory optics cut, with no shims and no drilling.

Optics Daniel Defense lists for Plate 3

Plate 3 covers the C-More standard footprint. Daniel Defense’s RDS manufacturer index assigns these optics to Plate 3:

• C-More RTS and RTS 2
• C-More STS and STS 2
• Delta Optical MiniDot HD 24
• Delta Optical MiniDot HD 26
• Delta Optical Stryker
• FTP Optics Alpha 3
• Kahles Helia RD
• Kite Optics K1
• Sig Sauer Romeo3 1×25
• Sig Sauer Romeo3 Max 1×30
• Sig Sauer Romeo3 XL 1×35
• Vector Optics Frenzy 1x26x32
• Vortex Razor

Key Facts

• Brand: Daniel Defense
• Model: DANIEL H9 RDS Adapter Plate 3 Kit
• SKU / MPN: 28-196-16270
• Optic footprint: C-More standard
• Fits: DANIEL H9 handgun
• Material: Sturdy stainless steel
• Mounting: Two T-15 Torx Plus screws; alignment arrow faces the muzzle
• Kit contents: Mounting plate, all necessary mounting hardware, installation tool

Which of the four plates do you need?

Choose by the optic’s footprint. All four kits fit the same H9 slide:

• Plate 1 — Shield standard footprint
• Plate 2 — Trijicon RMR / SRO footprint
• Plate 3 — C-More standard footprint
• Plate 4 — Docter / Noblex standard footprint

Watch the Sig numbering: the Romeo3, Romeo3 Max and Romeo3 XL are all assigned to Plate 3, but Sig’s wider Romeo range is not a single footprint.

Large-window optics on a compact pistol

Several optics on this list are physically large – the Romeo3 XL is a 1×35, the Romeo3 Max a 1×30 – and the H9 is a compact, listed at 7.69 in. overall with a 4.28 in. barrel. Check that the optic clears your holster, and check how its window sits relative to your irons: the H9 ships with carbon steel dovetail-cut sights and a fiber optic front zeroed at 25 yards. See our optic plates and adapters and holsters.

Fitting the plate

The plate fastens to the slide with two T-15 Torx Plus screws, alignment arrow toward the muzzle. The kit contains the mounting plate, all necessary mounting hardware and an installation tool, and Daniel Defense is specific that you should use the provided tool to prevent stripping the threads. The slide is 4340 alloy steel and those threads are small: seat the plate flat, use the supplied tool, leave the power driver alone.

Ordering from Western Sport in Roanoke, TX

Western Sport in Roanoke has held an FFL since 2007, carries SOT credentials and is a Daniel Defense master dealer with a gunsmith on site. We fit pistol optics regularly and can usually say straight away whether a large competition dot will work with the holster you own. Call 817-393-4000 with your optic model.

Frequently Asked Questions

Q: What footprint is Daniel Defense H9 Plate 3 cut for?

A: The C-More standard footprint. Plate 3 is the plate Daniel Defense’s RDS index assigns to the C-More RTS and STS families and to optics sharing that pattern, including the Sig Sauer Romeo3 series, the Vortex Razor and the Delta Optical MiniDot HD sights.

Q: Will Plate 3 mount a Sig Sauer Romeo3 on the DANIEL H9?

A: Yes. Daniel Defense lists the Sig Sauer Romeo3 1×25, the Romeo3 Max 1×30 and the Romeo3 XL 1×35 under Plate 3. Check the exact designation on your optic before ordering, because Sig’s broader Romeo line does not all share one mounting footprint.

Q: Does Plate 3 fit the C-More RTS 2 and STS 2?

A: Yes. The C-More RTS, RTS 2, STS and STS 2 are all assigned to Plate 3, which is the plate cut for the C-More standard footprint. The kit includes all necessary mounting hardware and an installation tool for fitting the plate to the slide.

Q: Will a large competition dot still fit my holster?

A: Not always. Several optics on the Plate 3 list have large windows, and an optic-cut holster is sized for a particular envelope rather than anything you can bolt on. Check the holster before buying the optic, or call 817-393-4000 for what we have seen work.

Q: How is the plate fitted to the pistol?

A: Two T-15 Torx Plus screws hold the plate to the H9 slide with the alignment arrow facing the muzzle. Daniel Defense supplies all necessary mounting hardware and an installation tool, and instructs owners to use that tool to prevent stripping the threads in the slide.

Q: What is the plate made from?

A: Stainless steel. It is a structural part rather than a spacer: everything the optic experiences passes through the plate and its two screws every time the slide cycles, so material and flatness matter. Stainless also holds up to years of sweat and solvent.

Additional information