Trijicon 100173 ACOG 5.5x50mm Illuminated Red Chevron .223/5.56 BDC Riflescope - Black Hardcoat Anodized

The Trijicon ACOG (Advanced Combat Optical Gunsight) is a fixed-magnification riflescope designed for tactical and combat applications. This configuration, the 5.5x50mm (part number 100173), sits at the high-magnification end of the ACOG lineup and pairs a large 50mm objective with a .223/5.56-calibrated combat reticle.

The scope features an Illuminated Red Chevron .223/5.56 BDC reticle with bullet-drop compensation marks calibrated for the .223/5.56 cartridge, providing a clear aiming reference for rapid target engagement. Optical performance comes from 5.5x fixed magnification through a 50mm objective, producing a 18.40 ft @ 100 yds field of view and 2.20" of eye relief.

Turrets adjust in 5 Clicks per Inch @ 100 yds increments, and parallax is set from 5 yards to infinity. The ACOG measures 12" overall and weighs 25.60 oz. The tube and housing wear a non-reflective Black Hardcoat Anodized finish, and the lenses are Multi-Coated for improved light transmission and image contrast. The optic is built and tested to be Fogproof, Shockproof, and Waterproof, ready for hard use across all environments.