The Trijicon ACOG 4x32mm 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 TA31-C-100372). 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 Rem/5.56 NATO.

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Key Specifications

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• Delivers 4x fixed magnification through a 32mm objective lens.

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• Features an illuminated Red Crosshair reticle for a fast, repeatable aiming point.

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• Reticle is calibrated for .223 Rem/5.56 NATO ballistics.

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• Uses Trijicon’s battery-free dual-illumination (fiber optic by day, tritium at night).

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• Built around Trijicon’s Bindon Aiming Concept (BAC) for both-eyes-open shooting.

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• Manufactured by Trijicon.

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Frequently Asked Questions

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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.

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

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What magnification and objective size does this ACOG have? This model is a fixed 4x magnification with a 32mm objective lens.

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Buy the Trijicon ACOG 4x32mm FDE Red Crosshair (.223) Riflescope

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