Description
Trijicon SRO 1 MOA Red Dot Reflex Sight, Coyote Brown
The Trijicon SRO 1 MOA red dot sight combines a fine aiming point with a wide viewing window and a coyote brown anodized housing.
Choose the SRO1-C-2500021 optic when you prefer the smallest red dot in the SRO range and a coyote brown finish. Its 1 MOA aiming point covers less of a small mark than the 2.5 MOA and 5 MOA alternatives. The fine dot gives you a less obstructed view of the aiming point without changing the optic’s overall size.
The 0.98 x 0.89-inch window provides a generous view around the dot, and the tempered-glass lens sits within a coyote brown anodized aluminum housing. The sight is non-magnifying and uses a single red dot, keeping the display simple. It offers the same RMR footprint as the black 1 MOA version.
Brightness Control and Battery Access
Side-mounted buttons provide eight manual brightness settings, including two night-vision-compatible levels and a super-bright setting. Automatic mode responds to ambient light. Lock-In mode holds your selected brightness, while Lock-Out mode keeps the optic in automatic operation and prevents accidental changes with the buttons.
The top-loading compartment lets you replace the CR2032 battery without removing the optic from its mount. Trijicon rates red-dot SRO battery life at over three years of continuous use at setting 4 of 8 and 70 degrees Fahrenheit (21 degrees Celsius). Higher brightness settings and extreme temperatures can shorten that runtime.
Construction and Mounting
The housing is made from forged 7075-T6 aluminum and uses an open-emitter design. The RMR mounting footprint provides a choice of compatible mounts and adapter plates, but the SRO optic’s larger body still needs appropriate clearance. A rail mount or platform-specific adapter plate is not included.
Confirm SRO compatibility with your exact platform and holster before purchasing. Trijicon advises against installations where the front of the optic overhangs the chamber or breech face, because that can interfere with ejection. The RMRcc footprint is different from the standard RMR pattern used by this optic.
Details
- Manufacturer: Trijicon
- Model: SRO (Specialized Reflex Optic)
- Manufacturer part number: SRO1-C-2500021
- UPC: 719307620964
- Magnification: 1x
- Reticle: 1 MOA red dot
- Illumination: LED; automatic and manual brightness
- Brightness settings: 8 manual levels, including 2 night-vision levels and 1 super-bright level
- Brightness control features: Lock-In and Lock-Out modes
- Housing: Forged 7075-T6 aluminum
- Color / finish: Coyote Brown anodized
- Emitter: Open
- Lens: Tempered glass
- Sight window: 0.98 x 0.89 in (25 x 22.5 mm)
- Optic dimensions (L x W x H): 2.15 x 1.27 x 1.345 in, without mount
- Optic weight: 1.58 oz with battery, without mount
- Adjustment increment: 1 MOA per click
- Adjustment range: 150 MOA total travel (+/-75 MOA)
- Water resistance: 10 ft (3 m) for 1 hour, as shipped from the factory
- Mounting footprint: Trijicon RMR (not RMRcc)
- Mount included: No rail mount or platform-specific adapter plate
- Battery: One CR2032
- Battery access: Top-loading
- Battery life: Over 3 years at setting 4 of 8 and 70 F (21 C)







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