The Trijicon ACOG 3.5x35mm is a compact, internally adjustable combat riflescope built around Trijicon’s Bindon Aiming Concept (BAC), which lets shooters keep both eyes open for fast, instinctive target acquisition (model TA11J). It features a dual-illuminated reticle that combines fiber optics for daylight brightness with tritium for illumination at night, so it never needs a battery, with a red crosshair aiming point, calibrated for .223/5.56 NATO.

Key Specifications

• Delivers 3.5x fixed magnification through a 35mm objective lens.
• Features an illuminated Red Crosshair reticle for a fast, repeatable aiming point.
• Reticle is calibrated for .223/5.56 NATO ballistics.
• Uses Trijicon’s battery-free dual-illumination (fiber optic by day, tritium at night).
• Built around Trijicon’s Bindon Aiming Concept (BAC) for both-eyes-open shooting.
• Manufactured by Trijicon.

Frequently Asked Questions

Does this Trijicon ACOG need a battery? No. This ACOG uses Trijicon’s dual-illumination system, fiber optics by day and tritium at night, so there is no battery to replace.

What caliber is the reticle calibrated for? The reticle is calibrated for .223/5.56 NATO, matching typical ammunition drop out to several hundred yards.

What magnification and objective size does this ACOG have? This model is a fixed 3.5x magnification with a 35mm objective lens.

Buy the Trijicon ACOG 3.5x35mm Red Crosshair (.223) Riflescope

Get precise, both-eyes-open aiming with this Trijicon optic, or browse our full gun scopes selection.