May 13 update: Range report added on post 19
I was looking for a new sight for my FS2000 I picked up last fall—I’d been using a Holosun 403C I’d borrowed off my Vector but needed a permanent solution. I had intended to use my Meprolight M5 sight when I bought the FS2k but that sits too high for me—the FN has a raised rail that makes sights that work well on ARs or (especially) Tavors sit too high for me. I’d found that the Holosun sat perfectly—just a bit higher than an Aimpoint Micro, which sits a bit too low.
I’d seen a few posts about the MRO (it’s a 2 MOA sight), and I’d had good luck before with a few ACOGs and RMRs (now down to just one ACOG) so I thought I’d give it a try. The problems that the SRS had, plus a few online reports of parallax issues with the MRO gave me a bit of concern, but I thought I’d try it anyway.
The sight comes in Trijicon’s usual hard-shell case and includes the hex key, battery, manual, lens cloth, plus the traditional sticker. Lens covers or a scope coat would have been a nice addition
The first thing I noticed was that it was smaller than pictures made it look—it’s not that much bigger than an Aimpoint Micro—and at 4.1 oz it’s only 0.8 oz heavier. Here is it compared to my Micro and Holosun sights.
The objective lens is significantly bigger, though.
Mine came with the Trijicon factory low mount—nothing fancy…just a couple of hex screws. You can also see in the picture below the windage adjustment. Unlike Aimpoints there are no caps over the adjustments.
Here’s the elevation adjustment, as well as the big brightness knob. I like how easy it is to adjust, although I’d never had a problem with the Micro’s side-mounted knob. You can also see the slot for the battery cover on top of the brightness knob.
Interestingly, there are two “off” positions. One between the 2 and 3, and one below the 1. I guess the theory being that if you’re just using it in daylight use can turn it off after the 3 and have it ready again with fewer clicks.
Looking through the sight it does exhibit a bit of a “lens-y” effect that RMRs do, with maybe a slight bit of magnification. The effect didn’t bother me on the RMRs, but it is a bit more noticeable than with the Micros. There’s a slight bluish-green tint too, also similar to the Micros. One of the things I liked about the Meprolight M5 sight was the perfectly clear and distortion-free. The MRO exhibits, to my eyes, the same amount of astigmatism distortion that the Micro does—the RMR was better in this respect, but it also had a larger 3.25 MOA dot which could account for the difference.
Of course, the big claim to fame for the MRO is the larger field of view. Here it is compared to my Micro and Holosun (the greenish tint of all three sights is more prevalent in these pictures than it is with the naked eye).
MRO
Micro
Holosun
The MRO does indeed have a larger field of view, but in doing a few “test sightings” with the FS2000 compared to the Micro on my Diablo it does not seem “night and day” different. I'm satisfied so far—I’ll have to see how it works at the range.

I was looking for a new sight for my FS2000 I picked up last fall—I’d been using a Holosun 403C I’d borrowed off my Vector but needed a permanent solution. I had intended to use my Meprolight M5 sight when I bought the FS2k but that sits too high for me—the FN has a raised rail that makes sights that work well on ARs or (especially) Tavors sit too high for me. I’d found that the Holosun sat perfectly—just a bit higher than an Aimpoint Micro, which sits a bit too low.
I’d seen a few posts about the MRO (it’s a 2 MOA sight), and I’d had good luck before with a few ACOGs and RMRs (now down to just one ACOG) so I thought I’d give it a try. The problems that the SRS had, plus a few online reports of parallax issues with the MRO gave me a bit of concern, but I thought I’d try it anyway.
The sight comes in Trijicon’s usual hard-shell case and includes the hex key, battery, manual, lens cloth, plus the traditional sticker. Lens covers or a scope coat would have been a nice addition

The first thing I noticed was that it was smaller than pictures made it look—it’s not that much bigger than an Aimpoint Micro—and at 4.1 oz it’s only 0.8 oz heavier. Here is it compared to my Micro and Holosun sights.

The objective lens is significantly bigger, though.

Mine came with the Trijicon factory low mount—nothing fancy…just a couple of hex screws. You can also see in the picture below the windage adjustment. Unlike Aimpoints there are no caps over the adjustments.

Here’s the elevation adjustment, as well as the big brightness knob. I like how easy it is to adjust, although I’d never had a problem with the Micro’s side-mounted knob. You can also see the slot for the battery cover on top of the brightness knob.

Interestingly, there are two “off” positions. One between the 2 and 3, and one below the 1. I guess the theory being that if you’re just using it in daylight use can turn it off after the 3 and have it ready again with fewer clicks.

Looking through the sight it does exhibit a bit of a “lens-y” effect that RMRs do, with maybe a slight bit of magnification. The effect didn’t bother me on the RMRs, but it is a bit more noticeable than with the Micros. There’s a slight bluish-green tint too, also similar to the Micros. One of the things I liked about the Meprolight M5 sight was the perfectly clear and distortion-free. The MRO exhibits, to my eyes, the same amount of astigmatism distortion that the Micro does—the RMR was better in this respect, but it also had a larger 3.25 MOA dot which could account for the difference.
Of course, the big claim to fame for the MRO is the larger field of view. Here it is compared to my Micro and Holosun (the greenish tint of all three sights is more prevalent in these pictures than it is with the naked eye).
MRO

Micro

Holosun

The MRO does indeed have a larger field of view, but in doing a few “test sightings” with the FS2000 compared to the Micro on my Diablo it does not seem “night and day” different. I'm satisfied so far—I’ll have to see how it works at the range.
Last edited: