Trijicon RMR footprint standard

February 15, 2025

Which red dots will be working with the Trijicon mount? Will you be able to install Holosun 507C on the same plate as Trijicon RMR red dot sight? We cover the full compatibility of the footprint in this article.

Footprint compatibility explained

What does a “footprint” mean? The term footprint refers to a sctructure of the sockets and screw holes on the base of the optic device.

And what does it mean if the footprints are compatible? Each optic sight has some base for mounting. The base consists of pins on various positions and holes for screws used for fixation of the sight to the mount.

If any two sights use the same base for mounting, we call that that they share the same footprint. In this article we show which red dots share the same footprint.

Trijicon RMR footprint pattern

RMR footprint consists of two sockets in the front and two screw holes in the middle of the sight.

The front socketes are 22,5mm / 0.89 inches far from each other, each positioned in the corner of the front of the sight. Position of these two sockets corresponds to position of pins that are on a mounting surface of any mount for this standard.

The screw holes are positioned cca in the middle of the optic device. These function for fixation of the sight to the mount. These two screw holes are 18,8mm / 0.74 inches far from each other.

The screws that are to be used for these screw holes are always included in the package with the sight.

Compatible red dots

RMR is one of the most common footprints on the market.

Below you can find complete list of sights that will work with Trijicon footprint.

Trijicon RMR standard

ADE Advanced Optics RD3-019 Stingray,
ADE Advanced Optics RD3-020 Raptor,
ADE Advanced Optics RD3-023 Valkyrie,
Holosun 407C,
Holosun 407C-GR,
Holosun 407CO,
Holosun 507C,
Holosun 507C-GR,
Holosun 507 Comp,
Holosun 507 Comp-GR,
Holosun 508T-RD,
Holosun 508T-GR,
Olight Osight C,
Olight Osight [RD],
Olight Osight [GR],
Olight Osight X,
Redwin Cobra 26x22 MTR,
Riton X3 Tactix PRD,
Spina BAT-24,
Swampfox Justice RMR 1×27,
Swampfox Liberty RMR 1×22,
Swampfox Kingslayer,
Trijicon RMR,
Trijicon SRO,
Vector Optics Frenzy 1x22x26,
Vector Optics Frenzy 1x22x26 MOS,
Vector Optics Frenzy 1x22x26 MOS MRS,
Vector Optics Frenzy-X 1x19x26 MRS GenII,
Vector Optics Frenzy-X 1x19x28 gen II,
Victoptics V3 1x17x26

Vector Optics Frenzy 1x22x26 MOS MRS red dot

(5)

$217.00 USD

In stock (52 units)

View details
Holosun 507 Comp

(4)

$621.00 USD

Very low stock (5 units)

View details
Vector Optics Frenzy 1x22x26 MOS red dot

(1)

$230.00 USD

In stock (69 units)

View details
Holosun 507 Comp GR

(2)

$708.00 USD

Very low stock (2 units)

View details
Vector Optics Frenzy-X 1x19x28 GenII

$244.00 USD

Low stock (15 units)

View details
Holosun 507C X2

(3)

$561.00 USD

Very low stock (2 units)

View details
Holosun 407C X2

(3)

$447.00 USD

Very low stock (1 unit)

View details
Victoptics V3 1x17x26

$81.00 USD

Very low stock (1 unit)

View details

How to mount red dot with Trijicon RMR footprint

It depends on what device you want to mount it.

Will you install it on a a picatinny mount? I.e. gun equipped with picatinny rail? Then you need to look for picatinny mount with RMR footprint.
Or will you mount it on a pistol? And will the pistol be optics ready (with pistol slide cut for red dot). Then you need to look for red dot mount with RMR footprint.
Or will it be standard pistol without such cut? Then you need to look for optic plate with RMR footprint.

Other footprint standards

There are many different bases for red dot sights, but the other most common are following:

Perfect.

Outer Impact is the best. A perfect red dot mount universal for my HS 507c on my glock 17.
An excellent trade.
I recommend.

Glock [G17, G19, G26 & other] red dot mount universal | type C

Almost perfect for a P226 x-six.

It would be even better if the opto rods were orange. Maybe it's possible to change! :-)

Sig Sauer P226 X-Five & P226 X-Six old variant adjustable rear sight | with fiber optics

Conforme

Support idéal pour un globe 24 et un Point Rouge Buchel, adaptation parfaite, je recommande

Glock 17, Glock 19, Glock 26 red dot mount | type S

perfekt

Walther PDP 2.0 [2022] plate | Trijicon RMR footprint

Holosun 507C X2

Excellent on my CZ Shadow2 Compact!!!

Excellent service

Easy to order and overnight delivery to Belfast NI.
I will have no hesitation in using this company again. Very happy.

KMR S-02 Optics Ready plate | Trijicon RMR footprint

Besz for Shadow01

I did not have to machine the slide. It just pops on, you do not need gun master to install.
The plate covers the space between the itself and the slide. You can install it to the middle of the slide only. It does not move at all.

CZ 75 SP-01 Shadow red dot mount universal | type C

IPSC Optics division

Work great in converting my 1911 to optics without alot of heavy modifications. Did require aome fitting and and clearencing but that was expected

1911 [LPA Cut] red dot mount universal | type B

CZ P-10 Optics Ready plate

Fast and cheap, what could you want more? Greetings to all the team OS

CZ P10 C optics plate adapter

Quality of the plate is excellent as was the customer service. Shipping was very quick. I would definitely recommend Optics Spot!!

red dot mount universal | type C?

Très bien comme d habitude optics spot et tres efficace et le produit et conforme à mes attente

👍👍👍

Perfect

Perfect fit

Perfect fit and easy to install!

Walther PDP 2.0 [2022] plate | Holosun K-series footprint

Perfect !!!

Easy to order, top !

Springfield 1911 DS Prodigy optics ready plate with sights | Trijicon RMR footprint

Great

Great product

HK VP9, SFP9, VP40, P30, HK45 red dot mount universal | type A

Quality Solution

Since I couldn’t get a potential slide replacement for my no longer produced pistol, I couldn’t take a chance of milling it. Your type B red dot mount was my salvation. It works fantastic. Only suggestion is not having your newer insertion tool was a problem as the dive tail on the mount keep wanting to rise or ride out as you hammer the mount in place. Overall a great solution for older pistols and will tell my shooting buddies about it. Thanks! JS

Sig Sauer P220, 225, 226, 227, 229, 320 red dot mount universal | type B

Looks good and fits

Very nicht and solide product. But a bit expensive.

Walther PDP 2.0 [2022] plate | Shield RMSc footprint

Order not received

Unfortunately I have not received my order and appears to have been lost within the postal system. There has been no update on tracking for 2 half weeks

HK VP9, SFP9, VP40, P30, HK45 adjustable sight set with fiber optics

Fast delivery without any Problems

Amazing sights

I had some doubts, but when I put this sights to my PDP, there were no more doubts, it’s a very useful and good quality sights.

Walther PDP low sport sights with fiber optics

As expected

Entreprise sérieuse

J'étais sceptique de commander sur un site inconnu mais j'ai pu constater que ce que j'ai lu en terme de rapidité de livraison n'était pas usurpé. J'ai reçu ma commande en 5 jours, avec le week-end au milieu de ce laps de temps. De la République Tchèque au Värmland en Suède. La hausse était bien celle indiquée dans le descriptif et donc conforme avec mon CZ75B. Je recommande cette entreprise pour son professionalisme et achèterais à nouveau en toute confiance auquel cas je trouve un produit qui m'intéresse sur leur site.