Differences Between Trijicon RMR Sights
With more and more folks starting to put miniature red dot sights on handguns, a question we see quite frequently is which RMR do I get? The RMR is pretty much the standard for an RDS (Red Dot Sight) on a handgun and for good reason. Whether it's the new Balor mount from Raven Concealment Systems or a custom milled slide from ATEi , folks everywhere are adding these little sights to their pistols. But now that you’ve decided on an RMR, which one do you get? There’s quite a few different models out there and it can be overwhelming wading through all the different variants. Hopefully this article will help you make the most informed decision.
Doctor Gary Kenneth Roberts or DocGKR published a very good study on the use of RDS on handguns. If you're interested, you can read that HERE.
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An RM06 on a Unity Tactical ATOM slide.
Adjustable LED Models
The first one we will look at is the adjustable LED models. These are model numbers RM06, RM07 and RM09 and all of them feature a red LED dot. These models are all identical except for the size of the dot. They have 8 different brightness settings with an auto adjust feature but also has adjustment buttons on each side that allows you the ability to manually adjust the brightness in the event that you need to. They run off of a single CR2032 battery with an advertised life of 4 years if left on setting 4 of 8. (I recommend changing the batteries out annually just as a precautionary measure. Batteries are cheap so it's just a way to make sure the dot is always there when you need it. The way I remember it is all my sights get fresh batteries on my birthday.) They’re also available in a variety of colors including Black, FDE, Grey & OD Green.
The adjustable LED RMRs in Black, FDE, Sniper Grey & OD Green
Now Let's Talk Dot Size
The vast majority of folks choose either the RM06 (3.25MOA) or the RM07 (6.5MOA). The RM09 has a dot size of just 1MOA which most folks (myself included) just find too small for use on a handgun. On a rifle, it might be more desirable so keep that in mind. Just for a reference your average front sight on a pistol is about 6.5MOA. Most folks find this to be a good size for balancing speed and accuracy. The RM06 is half that size at 3.25MOA.
One thing to keep in mind is at higher brightness settings the dots will appear larger. So for instance on your 3.25MOA RM06, with the brightness turned all the way up, your dot will become something closer to 5 or 6MOA. Just something to keep in mind when selecting which dot size is right for you. There is a little bit of a learning curve when using an RDS on a handgun so if you’re new to an RDS on handguns, the 6.5MOA RM07 might be the choice for you but it is largely personal preference.
Left to right are the 1MOA, 3.25MOA & 6.5MOA dots
Something to keep in mind is that anytime you’re mounting an RMR to a surface that does not provide a completely flat surface that the entire RMR can sit on, you need to also install a sealing plate. On the bottom of the RMR is a small gasket that will keep water, dust, dirt etc out and keep your optic running. When mounted on a pistol, this gasket is typically not completely covered and is unable to provide the protection needed, Luckily the sealing plate is cheap and easy to install.
Notice the gasket around the battery compartment on the bottom of the RMR
Another thing to remember is if you purchase a Glock MOS pistol, you need to also get the Trijicon AC32064 sealing plate and screw kit in order for it to work. The screws that come with the RMR are too long and will not work properly with the mounting plate.
The Trijicon AC32064 mounting kit for the Glock MOS
Auto Adjust LED Models
These are the automatic adjustment LED models RM01 & RM02. These are pretty much identical to the RM06, RM07 & RM09 that we just covered except that they are auto-adjust only. There is no manual adjustment feature or capability. The battery life is rated at about 2 years of typical use but will vary based on the lighting conditions that your optic is in. The RM01 features a 3.25MOA dot just like the RM06 and the RM02 is the 6.5MOA dot similar to the RM07. These too are available in Black, Grey, FDE, OD Green & a newly released Nickel Boron finish.
While the RM01 and RM02 are a little cheaper than the RM06 & RM07, they are not the ideal option. A lot of users have reported issues with the dot “washing out” in low light conditions when a weapon mounted light (WML) or handheld is used making it difficult or impossible to see the dot. It is advised to go with the manually adjustable RM06 or RM07 version to avoid this problem.
The RM01 and RM02 in Grey and Nickel Boron. They're pretty much identical to the adjustable LED versions except there is no adjustment buttons on the side.
The last type that they offer are dual illuminated, battery free models which use fiber optics and tritium to produce the dot. There are quite a few options available in this setup too with different colors and shapes. These are the most affordable variants that Trijicon offers and they come in the same Black, Grey, FDE or OD Green bodies that the other versions do. The tritium lasts about 10 years before the brightness starts to fade at which point, you would have to replace the optic. One major difference between these and the LED models is the dual-illuminated versions come in either an Amber or Green dot or triangle.
The models are:
RM03 (13.0MOA Dot)
RM04 (7.0MOA Dot)
RM05 (9.0MOA Dot)
RM05G (Green, 9.0MOA Dot)
RM08A (12.9 MOA Triangle)
RM08G (Green, 12.9MOA Triangle)
Left to right are the dots from: RM03, RM04, RM05, RM05G, RM08A, RM08G
At first glance, it may seem like these are the way to go. After all, there’s no batteries to replace or die and they’re the most affordable. What’s not to love? The problem with the dual illuminated models is they are not able to be adjusted for brightness and a lot of folks have had issues with the dot washing out in low light conditions with the use of a white light similar to what happens on the RM01 and RM02 versions, only worse. It may sound like a good idea but they are known to be problematic as far as the dot brightness goes.
The dual illuminated RMRs
That's pretty much it as far as RMRs go. Hopefully this gives you the information you need to select which one is right for your application.
Here's a few links and videos that you may find helpful.
Primary & Secondary on Facebook.
Red dot sights. LED vs dual illumination