Trijicon 100555 ACOG ECOS Combo 4x32mm .223 BDC Amber Crosshair Riflescope - Flat Dark Earth w/ RMR Type 2

The Trijicon ACOG ECOS Combo is a fixed-power, combat-proven riflescope purpose-built to give the shooter a fast, intuitive aiming system across the full range of engagement distances. The ECOS package pairs the iconic 4x32 ACOG with a mounted Trijicon RMR Type 2 red dot and a set of backup iron sights, giving the operator a true dual-sighting setup for both CQB and mid-range precision work.

The ACOG body is finished in Flat Dark Earth and is built around a fixed 4x magnification with a 32mm objective. It carries an illuminated amber crosshair .223 BDC reticle lit by tritium and fiber optics, so it stays visible from bright daylight down to low/no-light conditions without the need for batteries. The reticle provides bullet-drop compensation out to useful .223/5.56 ranges. Multi-coated lenses maximize light transmission and contrast in every condition.

Optical performance is anchored by a 36.80 ft @ 100 yds field of view and a generous 1.50 in eye relief. Adjustment is precise at 2 clicks per inch @ 100 yds. The ACOG measures 6.20 in long and weighs 15 oz, and it is dry-nitrogen filled to be waterproof to 100 meters, fogproof, and shock-resistant - tested to withstand recoil from .22 LR up through .50 BMG. A quick-release mount is included for fast installation and removal.

The integrated RMR Type 2 features a crisp 3.25 MOA red dot, giving the shooter a lightning-fast close-quarters aiming option that co-witnesses with the ACOG's magnified reticle. Backup iron sights round out the package, ensuring the shooter always has a reliable aiming solution regardless of conditions.

Whether you run an AR-15, M4, M16, or similar .223/5.56 carbine, the Trijicon ACOG ECOS Combo is a versatile, battle-tested sighting system trusted by military, law enforcement, and civilian shooters alike.