The Scope That Changed Everything. There's a reason the Trijicon ACOG® (Advanced Combat Optical Gunsight) is the official medium-distance engagement optic of the Marine Corps and U.S. Special Operations Forces.
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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 4x32 options, including the Official Rifle Combat Optic (RCO) of the U.S. Marine Corps.
Adapted from the battlefields, US Forces have begun improving this proven Trijicon ACOG scope by adding a small red dot sight on top for close encounter missions. Trijicon has now created a similar model for the public, the TA31-C-100552. The main Trijicon scope provides a dual-illuminated reticle using fiber optics and tritium for bright aiming point in any light condition. The ranging reticle allows for bullet drop compensation out to 800 meters without any manual adjustments. A Trijicon RMR Type 2 sits on top with a 3.25 MOA aiming dotFEATURES
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Always On, Always Ready
Most ACOG® models are battery free, featuring a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light.
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Take Control
Several ACOG models are designed with a user adjustable brightness setting powered by a single AA battery. The 3.5x35 LED and 4x32 LED models both offer six adjustable brightness settings.
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Rugged, Reliable Housing Design
Fixed-power design allows for minimal moving parts to create a nearly indestructible sighting system.
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"Both Eyes Open" Design
“Both eyes open” shooting using The Bindon Aiming Concept (BAC) allows for improved situational awareness.
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Outstanding Clarity
The quality of the glass and multi-coated lenses maximize light-gathering capabilities and clear field of view with zero distortion.
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Exact Target Distances & Hold
Most ACOG models feature a bullet drop compensating and target-ranging reticle for decisive aiming.
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Combat Proven
No other magnified optic has been used more in combat than the ACOG.
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Shock-Resistant
Proven to withstand recoil from a .22LR to a .50BMG and everything in between. Easily passes U.S. Military drop test requirements.
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Waterproof
Exceptional waterproof performance that exceeds military standards. Dry nitrogen-filled to eliminate fogging. This optic is tested to withstand and perform in extreme cold and heat with dry-nitrogen filled housing that mitigates fogging.
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Weight
15.1 oz. (428.08g) -
Magnification
4x -
Objective Size
32mm -
Reticle Pattern
Crosshair / Chevron
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Day Reticle Color
Green / Red -
Night Reticle Color
Green / Red
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Bullet Drop Compensating (BDC)
Yes -
Caliber
0.223
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Bindon Aiming Concept (BAC)
Yes -
Illumination Source
Fibre Optics & Tritium
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Power Source
Fibre Optics & Tritium -
Eye Relief
1.5 in. (38.1mm) -
Exit Pupil
0.32 in. (8.13mm) -
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 Aluminium
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Finish
Matte Black
INCLUDES
- 3.25 MOA Trijicon RMR Type 2 attached with mount
- Thumbscrew Flattop Adapter (TA51)
- LENSPEN (TA56)
- Lanyard Assembly for Adjuster Caps (TA71E)
- Trijicon Logo Sticker (PR15)
- ACOG BAC Manual
- Warranty Card