Trijicon ACOG 4×32 Dual Ill Green BDC Crosshair (TA31-CH-G) with TA51 Mount


Out of stock


The one that started it all.

The concept was simple; a durable scope with a reticle that illuminates in low-light and no-light situations—without requiring the use of batteries.

More than 30 years later, the original ACOG stands the test of time as one of our most popular items. Choose from many 4×32 options, including the Official Rifle Combat Optic (RCO) of the U.S. Marin Corps.


The 4×32 ACOG scope provides a dual-illuminated reticle using fiber optics and tritium for a bright aiming point in any light condition. The ranging reticle allows for bullet drop compensation out to 600 meters without any manual adjustments.


Thumbscrew Flattop Adapter (TA51)
4×32 Scopecoat (TA64)
Lanyard Assembly for Adjuster Caps (TA71E)
Trijicon Logo Sticker (PR15)
ACOG BAC Manual. Warranty Card


Weight – 15.1 oz. (428.08g)
Magnification – 4x
Objective Size – 32mm
Reticle Pattern – Crosshair
Day Reticle Color – Green
Night Reticle Color – Green
Bullet Drop Compensating (BDC) – Yes
Caliber – .223 / 5.56
Bindon Aiming Concept™ (BAC) – Yes
Illumination Source – Fiber Optics & Tritium
Power Source – Fiber Optics & Tritium
Eye Relief – 1.5 in. (38.1mm)
Exit Pupil – 0.31 in. (7.87mm)
Field of View (degrees) – 7°
Field of View (feet) – 36.8 ft. @ 100 yds. (12.27m @ 100m)
Mount – Flattop Thumbscrew Mount (TA51)
Housing Material – Forged Aluminum
Finish – Matte Black


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