Trijicon ACOG TA31-D 4×32 ECOS FDE, Illuminated Green .223

Description

The Trijicon ACOG TA31-D 4×32 ECOS is a fixed-power combat optics package that pairs a 4x magnified ACOG with a Trijicon RMR Type 2 red dot for dual-sighting flexibility. The optic features an illuminated green crosshair reticle calibrated for .223/5.56 BDC and uses fiber optics plus tritium for reticle illumination. Built with a forged 7075-T6 aluminum housing, multi-coated lenses, and dry-nitrogen filling, the ACOG is engineered for field durability and consistent optical performance. This ECOS package ships with a 3.25 MOA RMR Type 2 red dot and a quick-release mount for rapid installation and use.

Key Specifications

• The magnification is 4x for fixed-power clarity and consistent sight picture.
• The objective lens measures 32mm to balance light gathering and compact size.
• The reticle is an illuminated green crosshair calibrated for .223/5.56 BDC.
• This package includes a 3.25 MOA RMR Type 2 red dot mounted to the ACOG.
• The housing is forged 7075-T6 aluminum and the unit weighs 15 oz.
• The overall length is 6.2 inches for a compact profile.
• The eye relief is 1.5 inches for consistent cheek welds and sighting.
• The field of view at 100 yards is 36.8 ft.
• Adjustment is provided at a 1/2 MOA click value (two clicks per inch @100 yds).
• The mount supplied is a quick-release mount included with the optic.

Designed to serve in both close-quarters and longer-range roles, the TA31-D ECOS gives shooters a durable magnified sighting solution with a fast, non-magnified backup in the RMR. Its combination of fixed 4x optics, illuminated BDC reticle, rugged construction, and the added speed of an RMR makes it a practical choice for users who want a straightforward, reliable dual-sight setup.