Trijicon ACOG 4x32 ECOS Rifle Scope FDE, 5.56 Amber Crosshair, 3.25 MOA RMR

The Trijicon ACOG 4x32 ECOS rifle scope pairs magnified accuracy with close-quarters speed through a dual-sighting system built for tactical shooters who demand flexibility across engagement distances. The 4-power magnification and 32mm objective deliver a clean sight picture for 5.56 shooting from barricades to midrange work, while the integrated 3.25 MOA RMR Type 2 red dot mounted on top lets you flip between optics in seconds—no fumbling, no tools required. Flat Dark Earth (FDE) housing matches modern tactical rifles, and the crosshair reticle illuminates amber at night (powered by tritium) for reliable low-light performance without batteries.

This isn't a compromise optic trying to do everything equally; it's built on the principle that the right tool depends on the moment. Close quarters? RMR. Distance shooting? ACOG magnification. The external windage and elevation adjusters stay fully waterproof to 11 meters without protective caps, so you're never fumbling with gear in the field. At 15 ounces and 6.2 inches long, it won't make your rifle front-heavy, and the 1.5-inch eye relief keeps you seated properly behind the gun. Field of view opens up to 36.8 feet at 100 yards—plenty of light for indoor work or dimly lit timber.

Comes complete with the quick-release mount, backup iron sights, a LENSPEN for lens care, and a lanyard assembly for your adjuster caps. This is Trijicon's answer to shooters who refuse to pick between speed and precision.

Key Features

• Dual-sighting system: 4x32 ACOG scope with integrated 3.25 MOA RMR Type 2 red dot
• Amber-illuminated crosshair reticle for night shooting (tritium-powered, no battery dependence)
• External windage and elevation adjusters—no tools needed, fully waterproof to 11 meters
• Forged aluminum housing in Flat Dark Earth finish
• Quick-release mount included; integrates with standard tactical rails
• Backup iron sights, LENSPEN lens cleaner, and adjuster cap lanyard included
• Optimized for 5.56/.223 calibration

Specifications

Frequently Asked Questions

What comes in the box with the ACOG ECOS?

The kit includes the ACOG 4x32 scope with integrated RMR Type 2 red dot, a quick-release mount, backup iron sights, a LENSPEN lens cleaner, a lanyard assembly for adjuster caps, a manual, and a Trijicon logo sticker.

Can I use the RMR red dot and ACOG independently, or do I have to switch between them?

The RMR Type 2 is mounted on top of the ACOG, allowing you to use either sight depending on your tactical situation. You can aim through the magnified ACOG for precision shooting or rely on the 3.25 MOA red dot for rapid target acquisition.

Is this scope suitable for 5.56 NATO ammunition?

Yes, the ACOG ECOS is calibrated for 0.223 (5.56) ammunition, making it purpose-built for that cartridge.

Do I need tools to adjust windage and elevation?

No. The ACOG ECOS features external windage and elevation adjusters that require no tools, and they remain fully waterproof to 11 meters without protective caps.