The Trijicon MRO SD 1x25 Green Dot Sight 2 MOA Coyote Lower 1/3 Co-Witness Mount (SKU MRO-C-2200349) is a 1x non-magnifying 25 mm tube green dot sight with a 2 MOA green dot, eight brightness settings including night-vision compatible positions, and a forged 7075-T6 aluminium housing finished in Coyote.
SD stands for Standard Dot: a single 2 MOA dot and nothing else in the window. A 2 MOA dot covers about 2.1 in (53 mm) at 100 yards, which is small enough to shoot precisely at distance and still bold enough to find instantly with both eyes open. Trijicon builds the MRO around a wide 25 mm objective and a short body, so the window feels larger than the tube diameter suggests.
Trijicon builds the MRO — Miniature Rifle Optic — to the same standard as its duty optics: a forged 7075-T6 aluminium housing, sub-flush adjusters that cannot be knocked off zero in a slip, and a body sealed to be waterproof to 100 ft (30 m). That heritage is engineering, not marketing.
Mount Option: Lower 1/3 Co-Witness Mount — this optic is stocked in four mounting configurations: MRO SD green dot sight with no mount, MRO SD green dot sight with low mount, MRO SD green dot sight with full co-witness mount and MRO SD green dot sight with lower 1/3 co-witness mount.
How It Compares
This one ships with a lower 1/3 co-witness mount, which sits the dot above the irons so they sit in the bottom third of the window. On finish, this is Coyote — the same optic is also stocked in MRO SD green dot sight in matte black. On dot colour, this is the green dot; the MRO SD red dot sight is the alternative, and green reads brighter to the human eye while red preserves dark adaptation better. Want a segmented 68 MOA circle around the dot instead of a plain dot? That is the Trijicon MRO HD red dot sight with the 68 MOA circle-dot reticle. Want a quick-release Q-LOC mount for kit that comes on and off? That is the Trijicon MRO SD Patrol red dot sight. Adding reach behind the dot is a magnifier job — see the red dot sight magnifiers or the ready-matched MRO SD Patrol and 3x magnifier combination. Browse the Trijicon rifle red dot sights, the optics for straight-pull rifles and the shotgun red dot sights, or read our red dot mount height chart, guide to co-witness heights and Trijicon buyer's guide.
Ideal For
- Practical and service rifle shooting on a straight-pull AR-pattern rifle, where one 1x dot covers every stage distance
- Practical shotgun and 3-Gun, where a 2 MOA dot is quick on close targets and still precise on slugs
- Night fox and vermin control alongside a lamp, using the night-vision compatible brightness settings
- Rimfire, gallery rifle and airsoft builds wanting a duty-grade 1x sight that will outlast the rifle
Key Features
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Reticle: 2 MOA dot, green — about 2.1 in (53 mm) at 100 yards
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Illumination: Adjustable LED, 8 brightness settings including night-vision compatible positions
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Magnification / Objective: 1x non-magnifying, 25 mm objective
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Mount: Lower 1/3 co-witness mount (included)
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Adjustment: 0.5 MOA per click, windage and elevation
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Power: One CR2032 coin cell
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Housing: Forged 7075-T6 aluminium, waterproof to 100 ft (30 m), finished in Coyote
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Origin: Made in USA
Technical Specifications
| Optic Type |
1x non-magnifying green dot sight |
| Magnification |
1x (non-magnifying) |
| Objective Lens |
25 mm |
| Reticle |
2 MOA dot, green |
| Illumination |
Adjustable LED, 8 brightness settings (night-vision compatible) |
| Click Value |
0.5 MOA per click |
| Battery |
One CR2032 coin cell |
| Mount |
Lower 1/3 co-witness mount (included) |
| Finish |
Coyote |
| Housing |
Forged 7075-T6 aluminium |
| Water Resistance |
Waterproof to 100 ft (30 m) |
| Country of Origin |
Made in USA |
| SKU / MPN / UPC |
MRO-C-2200349 / MRO-C-2200349 / 719307622692 |
What's Included
- Trijicon MRO SD 1x25 green dot sight (MRO-C-2200349)
- Lower 1/3 co-witness mount
- Lens cloth
- User manual
- Warranty documentation
Warranty
Covered by Trijicon's manufacturer's warranty. Keep your order confirmation as proof of purchase and register the optic with Trijicon after fitting; we handle warranty claims for you from the UK.
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Trijicon's warranty.
Frequently Asked Questions
What does SD mean on the Trijicon MRO SD?
SD stands for Standard Dot. The Trijicon MRO SD has a single 2 MOA aiming dot with nothing else in the window, where the Trijicon MRO HD adds a switchable 68 MOA segmented circle around a centre dot.
What battery does the Trijicon MRO SD use?
The Trijicon MRO SD runs on a single CR2032 coin cell.
Will the Trijicon MRO SD fit a Picatinny rail?
This version is supplied with a lower 1/3 co-witness mount. The mount clamps to a standard Picatinny rail, which is what AR-pattern flat-top receivers, most straight-pull carbines and Picatinny-railed shotguns use.
What is the difference between full co-witness and lower 1/3 co-witness?
Full co-witness puts the dot at the same height as AR-pattern iron sights, so the irons sit in the middle of the window and line up with the dot. Lower 1/3 co-witness raises the dot so the irons sit in the bottom third of the window, leaving a cleaner view for the dot and a more upright head position. Our red dot mount height chart sets the heights side by side.
How big is a 2 MOA dot at 100 yards?
A 2 MOA dot covers about 2.1 in (53 mm) at 100 yards, so it is fine enough not to hide a target at distance while still being quick to pick up close in.
Is the Trijicon MRO SD waterproof?
Yes — the Trijicon MRO SD has a sealed forged 7075-T6 aluminium housing rated waterproof to 100 ft (30 m), which is why it is specified for hard outdoor use in British weather.
