ohhunt RMR to RMS Adapter Plate for Holosun 407K/507K - Low Profile

In this review the ohhunt adapter mount plate is examined for shooters who need a slim, durable way to install an RMS-style optic into an RMR cut slide. The bottom line: this is a lightweight, low profile titanium plate that solves a narrow compatibility problem - it lets owners of slides without a thread post use Holosun 407K/507K/EPS Carry/EPS/RomeoZero footprints with an RMR cut. If your slide lacks a thread post and you want a strong, minimal-height solution, this adapter is exactly the component to consider.

Key Features

• Material: Titanium construction provides high strength while keeping the adapter remarkably light for minimal added weight to the slide.
• Compatibility: Designed specifically for RMR cut slides without a thread post, it enables fitment of Holosun 407K/507K/EPS Carry/EPS/RomeoZero optics where direct mounting is not possible.
• Ultra low profile: The slim profile keeps the optic close to the slide, helping maintain sightline and concealment in carry pistols.
• Precision fit: Machined for the RMR to RMS interface so the optic seats securely and consistently without excessive gap or play.
• Lightweight: Minimal mass reduces impact on slide reciprocation and trigger characteristics compared with heavier plates.

Who It's For

This adapter is best suited to pistol owners who have an RMR cut slide that does not include a thread post and who specifically want to mount Holosun 407K/507K/EPS Carry/EPS/RomeoZero-pattern optics. It is also appropriate for users focused on carry pistols where low profile and reduced weight are priorities.

It is not the right choice for slides that include a thread post, since the adapter does not fit those configurations, and shooters who require an alternative footprint or non-RMS optic should look for a different mount. Gunsmith installation is recommended if you are not comfortable confirming fit and torque specs yourself.

Pros & Cons

Pros

• High-strength titanium keeps the plate lightweight without sacrificing durability.
• Ultra low profile design preserves sight height and concealability on carry slides.
• Precise machining supports a secure, repeatable fit for compatible Holosun optics.

Cons

• Limited to RMR cut slides without a thread post, so it will not work on slides that include that post.

Specifications

Brand	ohhunt
Material	Titanium
Compatibility	Holosun 407K/507K/EPS Carry/EPS/RomeoZero
Slide Fit	RMR cut slide without thread post
Profile	Ultra low profile, lightweight

Our Verdict

The ohhunt RMR to RMS adapter plate is a focused, well-made solution for shooters who need to mount Holosun RMS-pattern optics on an RMR cut slide that lacks a thread post. Its titanium build and low profile make it a sensible value for carry-oriented pistols, provided your slide is the compatible type. Buy it if you need a minimal, durable adapter that preserves sight height and reduces added mass.

Frequently Asked Questions

Will this plate fit slides with a thread post?
No. This adapter is not compatible with slides that include a thread post and is intended only for RMR cut slides without that post.

Which Holosun models are supported?
The plate is designed to work with Holosun 407K, 507K, EPS Carry, EPS, and RomeoZero footprints.

What is the plate made from?
The adapter is made of titanium, chosen for strength and low weight.