Trijicon's MRO (Miniature Rifle Optic) is close to two years old now and has established itself as a quality, American-made red dot.
With the introduction of the MRO Patrol model, I feel Trijicon has maximized the MRO platform. The MRO is not a traditional "tube" red dot sight.
The ocular lens is about the same size as you'll get with competing red dots, but the objective lens is a full 25mm in diameter. The resultant cone shape virtually eliminates the dreaded "tube effect" in red dots— in which you can see the inside of the tube, restricting your field of view.
Yes, you're supposed to keep both eyes open when using a red dot, so a narrow tube shouldn't matter, but it does. The MRO doesn't have this issue.
Powered by a CR2032 lithium battery, the MRO has a two m.o.a. red dot and eight brightness settings (including three night vision) with a second Off setting in the middle so you don't have to turn the knob all the way to shut off the sight.
At setting three, which is bright enough for a cloudy day or indoors, battery life is advertised as five years of continuous use.
The new MRO Patrol is the same basic unit but comes with a honeycomb kill-flash screwed onto the objective lens to eliminate glare. Both the ocular and objective lenses also come with flip-up lens covers.
The end result makes the MRO noticeably longer (four inches), but I like the way it looks. While the original mounts for the MRO worked, they were utilitarian and not quick to attach.
The MRO Patrol comes from the factory with a QD thumbscrew flattop mount, stylishly angled, with your choice of a co-witness height for your AR or a lower one-third height.
I really like the looks of the mount. The thumbscrew is spring-loaded and also has flats on it if you want to screw it down more than finger-tight.
I've been running an MRO Patrol on a CMMG Guard .45 ACP AR-15 pistol for a while now, and the Trijicon has weathered the recoil of the .45s without a single problem.
My only complaint with the MRO Patrol is that at a suggested retail price of $919 it is not only one of the most expensive red dots on the market, it is nearly $300 more than the original MRO with mount. — James Tarr; Rifle Shooter Magazine