Trijicon 100554 ACOG ECOS 4x32mm Green Crosshair .223/5.56 BDC Riflescope - Flat Dark Earth

The Trijicon 100554 ACOG ECOS is a 4x32mm combat riflescope purpose-built for both close quarter battle and longer-range shooting. This Enhanced Combat Optical Sight (ECOS) combo integrates the legendary ACOG with a co-witnessed Trijicon RMR Type 2 LED red dot, giving shooters a complete dual sighting system in a single package.

The ACOG body is CNC-machined from 7075-T6 aircraft aluminum alloy and finished in non-reflective Flat Dark Earth. The housing is waterproof to 100 meters, dry-nitrogen filled to prevent internal fogging, and shock-resistant, proven to handle recoil from .22 LR up through .50 BMG. Multi-coated lenses maximize light transmission for a crisp sight picture across a wide range of lighting conditions.

The dual-illuminated green crosshair .223/5.56 BDC reticle uses both tritium and fiber optic technology, automatically adjusting reticle brightness to match ambient light with no batteries required. With 4x fixed magnification, a 32mm objective, 1.50" eye relief, and a generous field of view, this optic delivers rapid target acquisition and reliable bullet-drop holdover for the .223/5.56 platform.

This ECOS combo includes the ACOG scope with a quick release mount, backup iron sights, and the co-witnessed Trijicon RMR Type 2 LED 3.25 MOA red dot for fast close-quarters work. The complete system measures 6.20" long and weighs 15 oz, ready to drop onto any standard Picatinny rail.