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Holosun RMR Footprint Optics: A Closer Look at the Features and Benefits

Holosun RMR Footprint Optics: A Closer Look at the Features and Benefits

Today we’re going to review the Holosun red dot pistol lineup with the RMR footprint. We’ll cover the 407C, 507C, 508T, 509T, and the EPS the features and performance of each sight, and help you decide which one is the best fit for your needs. So let’s get started!

RMR Footprint

First let’s discuss the RMR footprint and what type of pistols it’s meant for. The term footprint refers to the mounting pattern at the bottom of the sight. This specific footprint is referring to the Trijicon RMR optic, which has made this footprint pattern become pretty popular. The RMR footprint consists of two holes for screws and two sockets in which the pins on the mount fit. This footprint is for full sized and compact pistols. 

 RMR Footprint

C Series

I’m going to start with the most affordable then go to the most expensive, so first, let’s talk about the C series. The 407C and 507C are nearly identical, literally the only thing that is different about them is the reticle. The 407C has a 2MOA dot only, while the 507C has Holosun’s Multi-Reticle System. The Multi-Reticle System has three reticle options starting with a 32MOA ring and 2 MOA dot, a 2MOA dot only, and a 32MOA ring only. I have the 507C on a Glock 17 and personally I like the 32MOA ring only, but it’s totally up to personal preference. 

 507c vs 407c

Aside from the reticle all other features and dimensions of the sights are exactly the same. Both have the option to come in red or green, are made of aircraft grade 7075 T6 aluminum, have shakeawake technology, have Solar Failsafe, 12 brightness settings with a battery life of 50,000 hours, same window size, and same weight. Literally the only difference is the reticle which obviously affects the price. The 407C is about $60 cheaper than the 507C. 


One step up from the C series is the 508T. The main difference between the 407 and 507C and the 508T is that the 508T has a titanium housing instead of aluminum. Having a titanium housing helps increase the overall durability and toughness of the sights, and make it an extremely robust optic that is still lightweight. 

 508T vs 507C

The 508T has very similar dimensions, it does weigh 0.5oz more than the C series though. That's not noticeable to me, but something to take into consideration. More importantly, the 508T has a better window in my opinion. It is roughly the same size as the C series, but the C series is very curved whereas the 508T has a flat top more like the K series. 

Aside from that the 508T has all the same features as the C series like shakeawake, multi-reticle system, solar failsafe, it comes in red and green, and 12 brightness settings with long battery life. So really it comes down to if you want a more durable optic with a flatter top window, then the 508T is for you. 


Next in Holosun RMR pistol optic in the lineup is the 509T. There are some big differences between this one and the others. The 509T is an enclosed emitter optic, whereas the others are open emitters. Essentially that means that the 509T has a hood and extra lens to prevent rain, snow, or lint from blocking the emitter and causing it to not display the dot properly. A drop of rain on the emitter can cause your reticle to spatter and starburst. With no reticle, an optic is quite useless so with an enclosed optic, this is not an issue at all. 


The 509T has a slightly bigger window than the previous optics, and has a flatter top like the 508T.

The installation of the 509T is also very different from the C series and 508T, but is still not complicated to install. The 509T has a clamp at the bottom, and you could use different plates to mount it to different footprints or a picatinny rail. The 509T does come with an included RMR adapter plate, but if you wanted to put it on your rifle with a picatinny adapter you could, which is a huge plus for this optic. 

 509T Install

And like the 508T, the 509T has all of the same features as the C series which again is the shakewake, comes in red or green, has solar failsafe, and 12 brightness levels with a battery that can last up to 50,000 hours. So really if you want an enclosed emitter with titanium housing for the ultimate durability and protection, this is your optic. Just note that it is also Holosun’s most expensive pistol optic. 

EPS (Not The Carry) 

Lastly we have Holosun's newest and hottest pistol optic, the EPS. We wrote a whole review on the EPS, which has more information you can check out. The EPS is an optic we just received in stock here at Freedom Gorilla, so when we were checking out the newest shipments, we realized that the box lists it comes with an RMR adapter, which is pretty amazing.

RMR adapter plate for the EPS

The EPS's direct footprint is the modified RMSc like the Holosun K series, but with the adapter plate that comes included in the box, it'll mount to any RMR ready pistols too. This is a nice surprise from Holosun, because their website doesn't mention that at all. So although it isn't directly a RMR footprint, since it comes with the adapter plate in the box I'm including it in the list.

Like the 509T the EPS is also an enclosed emitter. It is made of titanium as well. The main differences between the two is the 509T has the clamp which allows it to be used in many different applications including mounting it to a picatinny rail on a rifle.

The EPS also comes in different reticle options and sizes (2MOA, 6MOA, MRS, Green/Red) whereas the 509T comes in Green/Red with the MRS only. 

Final Thoughts

Overall, the Holosun RMR footprint lineup offers a range of options for shooters. We hope this overview helps you decide which red dot will be the best fit for you, but if you have additional questions hit us up on our chat or through texts. 


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