Trijicon ACOG 4×32 BAC Riflescope .223/5.56 BDC Green Crosshair Reticle
Features
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Dual‑Illuminated, Battery‑Free ACOG: Fiber optics automatically regulate reticle brightness in daylight; tritium provides a continuous glow in low/no light—no batteries required.
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4× Fixed BAC Combat Optic: Bindon Aiming Concept™ supports both‑eyes‑open speed for close work while preserving precise 4× aiming at distance on 5.56/.223 carbines.
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.223/5.56 BDC Green Crosshair Reticle: Fine illuminated crosshair with ballistic stadia scaled for common 5.56 loads when zeroed at 100 m; green illumination is highly visible in bright, high‑contrast field conditions.
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Rugged Forged 7075‑T6 Aluminum Housing: Combat‑proven durability—shock, recoil, and hard‑use environmental resistance; fully sealed and fog‑proof.
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Waterproof to 100 m (factory rated): Exceeds typical duty requirements; nitrogen‑purged to prevent internal fogging.
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External Tool‑Less Adjusters: Positive ½ MOA windage & elevation clicks (2 clicks/inch @ 100 yd) for fast zeroing without loose turret caps.
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Wide Situational FOV: 7° / 36.8 ft @ 100 yd helps track movers and maintain awareness.
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Compact & Lightweight: Short 5.8″ body keeps weight forward‑neutral on AR‑pattern rifles; ships with TA51 flattop Picatinny mount.
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Made in USA & Backed by Trijicon Warranty.
Technical Specifications for Trijicon ACOG 4×32 BAC Riflescope .223/5.56 BDC Green Crosshair Reticle
Specification
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Details
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Manufacturer
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Trijicon
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Model / MPN
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TA31‑CH‑G / 100209
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SKU
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TA31‑CH‑G
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UPC
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719307304352
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Country of Origin
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USA
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Magnification
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4× fixed
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Objective Lens Diameter
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32 mm
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Optical Design
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Fixed‑power prism (integral ACOG housing)
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Reticle
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Green Crosshair .223/5.56 BDC (dual‑illum fiber optic / tritium)
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Illumination
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Automatic fiber (day) / self‑luminous tritium (night); battery‑free
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Eye Relief
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1.5″ (38 mm)
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Field of View @ 100 yd
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36.8 ft (7°)
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Exit Pupil
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8.1 mm
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Adjustment Click Value
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½ MOA (2 clicks/inch @ 100 yd)
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Total Adjustment Range
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~40 MOA windage & elevation (typical TA31 spec)
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Parallax Focus
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Fixed at 100 m (≈109 yd)
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Overall Length
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5.8″ optic body (approx. 7″+ installed w/ mount & caps)
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Weight
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9.9 oz optic‑only; approx. 15 oz class w/ TA51 mount & accessories (varies by kit)
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Housing Material / Finish
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Forged aluminum; matte black hard anodize
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Waterproof / Fog‑Proof
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Sealed; waterproof to 100 m; nitrogen‑purged
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Shock Resistance
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Combat‑rated (5.56 duty calibers and beyond)
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Mount Interface
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TA51 flattop Picatinny thumbscrew adapter (included)
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Included Accessories
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TA51 flattop Picatinny thumbscrew mount
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4×32 Scopecoat (TA64)
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LensPen® (TA56)
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Adjuster cap lanyard assembly (TA71E)
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Trijicon logo sticker (PR15)
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ACOG BAC operator’s manual
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Warranty card / registration info
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