Trijicon ACOG ECOS 4×32 FDE | TA31-D-100554

The Trijicon ACOG ECOS is a fixed-power 4×32 riflescope in Flat Dark Earth featuring an illuminated green crosshair BDC reticle calibrated for .223/5.56. This ECOS package pairs the magnified ACOG optic with a 3.25 MOA RMR Type 2 red dot, and ships with a Trijicon quick-release mount and backup iron sights. Illumination is provided by fiber optics and tritium for visible daytime and low-light use, and the optic includes external windage and elevation adjusters.

Typical applications include close-quarters shooting where the RMR aids rapid target acquisition, and mid-range precision work using the ACOG’s 4x magnification and bullet-drop compensating reticle.

Product Specifications

• The magnification is 4x.
• The objective diameter is 32mm.
• The reticle is an Illuminated Green Crosshair .223/5.56 BDC.
• The package includes a 3.25 MOA RMR Type 2 red dot mounted to the ACOG.
• The illumination source is Fiber Optics & Tritium.
• The optic includes an external windage and elevation adjuster and is water/fog/shock resistant.
• The product weight is 15 oz.
• The eye relief is 1.5 in.
• The field of view is 36.8 ft @ 100 yds.
• The housing is constructed from forged aluminum.
• The finish is Flat Dark Earth (FDE).
• The mount type included is a Quick Release mount.
• The optic uses a Crosshair reticle pattern with BDC functionality.
• The adjustment size is 2 Clicks per Inch @ 100 yds (click value listed as 1/2 MOA).
• The UPC is 719307311824.

Built to Trijicon’s durability standards, the ACOG ECOS package combines a robust, magnified aiming solution with a fast, unmagnified red dot to cover a wide range of real-world shooting tasks. The fiber-optic/tritium illumination system and external adjustments make it practical in varied light and environmental conditions. For shooters who value a low-maintenance, rugged optic that delivers both speed and precision, this ECOS combo is a clear, purpose-driven choice.