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Trijicon 100555 ACOG ECOS Combo Flat Dark Earth 4x32mm Illuminated Amber Crosshair .223 BDC Reticle

Trijicon 100555 ACOG ECOS Combo Flat Dark Earth 4x32mm Illuminated Amber - Main image
$1127.07 $1789 In stock

The Trijicon ACOG ECOS is the ultimate sight for both Close Quarter battle (CQB) situations and longer distance shooting where accuracy and pinpoint bullet placement are required. This dual-sighting system gives the shooter a distinct tactical advantage with the option of either the Trijicon ACOG or the 3.25 MOA RMR Type 2 Automatic LED Sight. With the quick target acquisition of the RMR sight or the precise aiming capabilities provided by the magnified 4 power Trijicon ACOG- the shooter has the ability to select the proper aiming solution for the situation at hand- truly the best of both worlds. No tools are needed for windage and elevation adjustments because the ECOS also features external windage and elevation adjusters, making it waterproof up to 11m without caps.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Victoria Z. ★★★★★

The dual-sighting setup is a game-changer, switching seamlessly from CQB to longer shots without losing the amber crosshair's clarity. The flat dark earth finish matches my rifle perfectly.

Carter ★★★★★

I mounted this on my AR and the BDC reticle lined up perfectly with my 55-grain ammo at 100 yards—first try. The combo with the top-mounted RMR-style sight makes transitioning between close and long targets seamless. Definitely worth the investment for a durable, accurate optic setup.

Violet ★★★★★

The amber crosshair is incredibly crisp even in bright sunlight, and the fiber optic makes it glow without needing batteries. Dual illumination means I can transition from my close-up backup sight to the 4x32 without missing a beat—it’s a solid setup for both quick shots and precise long-range work.