The Armasight CO-MR is one of the best options on the market for someone who is looking for a clip on night vision system. The quality of the product matched with the price point is fairly competitive when compared to other clip on systems.
Before I go on and explain my experience with CO-MR, let me first say that I am by no means a night vision expert. Prior to this, the only experience with night vision I have had is a couple of old school Gen 1 weapons sights that my friends have, and the PVS-14s from my job.
The CO-MR comes in the same nylon bag that PVS-14s are issued with, it contains all the extra accessories that you need to adapt it too your weapon system as long as you have a 1913 rail to mount it on in front of your optic. I was using a SCAR 17s with an IOR 1.5-8x26 Trident mounted with a LaRue LT158 mount. That pushed the CO-MR around 2-3 notches from the end of my 1913 rail. So with what I would call an intermediate optic, I used up all of my rail space (37 slots of 1913 rail). Just something to think about if you are looking at mounting this on a carbine or something with a shorter top rail.
On that note, you need to have the center of your optic raised about 1.44-1.5 inches above your rail to have it lined up with the CO-MR. (One quality which makes this a great option for AR systems). I will admit, the QD mount seemed a little flimsy initially, but after shooting several strings with mounts and dismounts between them, I feel better about it. As for POI shift, there is some. With Match Grade 168gr ammo, the SCAR usually holds 1-1.3in groups at 100yds in the daytime, but with the 168gr PPU I was using for the initial test, it opens up to about 2in. With the CO-MR my biggest groups where about 3in, smallest were 2in, average was around 2.5in. I did get the opportunity to shoot a couple 175gr match hand loads at night, and those groups averaged about 1.5in.
Clarity - To start off, I tested this product in the worst conditions possible for night vision. There was no moon, plenty of cloud cover, and it was a whopping 18 degrees. With all that I could still make out my 8in round targets at 100 yds. With the help of the IR illuminator, it was as clear as day. At 200yds I could make out the 30in, 25in, and 20in steel gongs without IR. But at 300yds I had to mark the gongs with IR Chem lights to see them. I couldn't use the IR illuminator that they sent with the CO-MR past 150yds even with the beam fully focused. I wasn't terribly impressed with the IR illuminator that Armasight sent. It has a swivel ball socket joint that is supposed to allow you to manipulate it into your field of view. Good idea, only problem is that the recoil of a .308 moves it off your target after a couple of shots. I wasn't happy with that. After successful shooting at 300yds with repeatable hits on the 20in gong, I moved over to the 500yd line. Without IR or any other light source, I was able to make out the white 4ft x 4ft numbered squares above the pit but could not make out the black ones. To see what type of detail I could get out of the CO-MR at 500yds, I faced my truck down range with my low beams on. I was about 50yds directly left of the truck looking through my scope. I can confidently say I would have no problem taking a 500yd shot with the CO-MR if there is a full moon out, or if I were to have a high quality IR illuminator.
I highly recommend this unit; Armasight has done a fantastic job with this product.
Pros: compact, light weight, usable
Cons: not cheap
This review was written in the old system and had content requirements that are different than reviews written today.