Description
The Trijicon MRO HD 3x Magnifier Combo set pairs Trijicon’s MRO HD circle-dot red dot with the matching 3x magnifier on a flip-to-side mount. It gives you a fast 68 MOA circle for close work and 3x magnification for identification and longer shots.

Trijicon MRO HD 3x Magnifier Combo Overview
This package is the MRO HD, the high-definition version of Trijicon’s Miniature Rifle Optic with a selectable circle-dot reticle. The 25mm objective and short tube give the MRO one of the widest fields of view of any micro red dot, which makes it easy to find the dot with both eyes open.
The HD Reticle
The MRO HD projects a 68 MOA circle around a 2 MOA center dot, and you can switch between the full reticle and the dot alone. The large circle is extremely fast to pick up at close range and helps with movers, while the dot handles precise shots at distance. The HD version also adds improved glass and coatings over the original MRO.

Power and Brightness
The HD uses a single coin cell with 16 brightness settings, 4 of them for night vision devices. Trijicon rates battery life at about 2.5 years with the dot alone at setting 5 of 8, but only about 75 days with the full circle reticle lit, so most users run the circle for defense and the dot for range work, or change the battery on a schedule.
Mounting
This package includes a lower 1/3 co-witness mount, the most popular height for AR-15 style rifles. Standard iron sights sit in the bottom third of the window, visible as a backup without cluttering the view, and the head position suits most shooters.

Magnifier and Night Vision
This combo adds Trijicon’s 3x magnifier on a quick-detach flip-to-side mount. Swing it in for identification and longer shots, swing it out for fast 1x work. Many owners switch to the dot-only reticle when magnified so the circle does not cover distant targets.
Built Like a Trijicon
The MRO SD uses a forged 7075 aluminum housing, sealed and filled with dry nitrogen, and is rated submersible to 100 feet. Capless, sub-flush adjusters move the dot 1/2 MOA per click and cannot be bumped or lose caps. Eight brightness settings include 4 for night vision devices, the top setting is super bright for sunny days. The housing has a matte black finish. Behind the magnifier, the large circle covers a lot of the target, so most owners switch to dot-only when magnified.
Ordering and Transfer
When you order a firearm from MAG5 Firearms, we ship it to the licensed dealer you choose. Your dealer completes the ATF Form 4473 and the background check, and may charge a transfer fee. Local buyers can complete the transfer at our shop. Bring a valid ID, and check your state waiting period before you plan a hunt or a range trip.
Safe Storage
Store the firearm unloaded in a locked safe or case, with ammunition kept separately. A cable lock or trigger lock is a good backup, especially in a home with children or visitors. Keep the original box and paperwork, and record the serial number in a safe place in case the gun is ever lost or stolen.
Specifications
- Model: MRO HD with 3x magnifier combo
- UPC: 719307616073
- Reticle: 68 MOA circle with 2 MOA dot, selectable
- Color: red
- Objective: 25mm, 1x
- Illumination: LED, 16 settings including 4 NVG
- Battery: one CR2032
- Adjustment: 1/2 MOA per click
- Finish: matte black
- Mount: lower 1/3 co-witness mount, plus 3x magnifier on flip mount
Before You Buy
Optics ship directly to you with no FFL transfer. Confirm the mount height you want and check rail space if you plan to add a magnifier.
Who It Is For
The Trijicon MRO HD 3x Magnifier Combo is a great fit for AR-15 owners who want a complete circle-dot and magnifier system from one maker, ready to install.
Buy the Trijicon MRO HD 3x Magnifier Combo at MAG5 Firearms
MAG5 Firearms is a family-owned shop in Collegeville, Pennsylvania. Optics do not require an FFL transfer, so the Trijicon MRO HD 3x Magnifier Combo ships straight to your door. Browse our full selection of red dot sights for more Trijicon optics. For factory details, visit Trijicon.






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