The TRIJICON ACOG 4x32 Scope w/ TA51 Mount, Dual Illuminated Amber Chevron .223 Ballistic Reticle (TA31F-A) is an internally-adjustable, compact telescopic sight for use in low light or at night. The ranging reticle is calibrated for 5.56(.223 cal) flattop rifles out to 800 meters. This model includes TA51 Flattop Adapter.
The chevron reticle is designed to be zeroed using the tip at 100 meters. The width of the chevron at the base is 5.53 MOA which is 19 in. at 300 meters. This allows range estimation for silhouette targets.
With its dual-illuminated reticle, the Trijicon ACOG provides shooters with a distinct aiming point in all light conditions - without batteries. Powered by a tritium-phosphor lamp, the gunsight's reticle glows in low-light conditions, while advanced fiber optics automatically adjust the brightness level and contrast of the reticle in brighter light conditions.
The Trijicon ACOG Scope incorporates the innovative Bindon Aiming Concept (BAC). This revolutionary, both-eyes-open aiming method provides you with "instinctive" target acquisition and increased hit potential. And, the scope's ranging is built into many of its reticles, so you only need to set zero once for a multitude of ranging distances.
Broad-band, anti-reflective coated lenses provide superior clarity and light gathering capabilities with zero distortion. The ACOG also offers a Large Eye Volume, which allows you to quickly acquire targets, even if you're not positioned perfectly behind the scope. Of course, once the target is acquired, you can then take time to position your eye and compose your shot.
The ACOG is crafted with a tough, military-grade, aluminum-alloy housing and is waterproof to depths of 500 feet / 150 meters - making it nearly indestructible. Only the prism housing moves, so it's much more rugged than conventional designs. And the ACOG does not require failure-prone batteries - so you can rely on it to perform in practically every situation.
Objective Size, mm
Field of View @ 100 yards, ft
Field of View, degrees
Adjustment @ 100 yards (clicks/in)
Eye Relief, in
Exit Pupil, mm
Fiber Optics & Tritium
Day Reticle Color
Night Reticle Color
Bullet Drop Compensator
Mount Comes With
9.9 (without mount)
ACOG delivers increased hit potential in all lighting conditions - without the use of failure-prone batteries
Bindon Aiming Concept (BAC) allows use of the both-eyes-open aiming method along with scope magnification sighting for rapid taget acquisition - in any light
Trijicon fiber optics automatically adjusts the brightness level and contrast of the reticle to available light conditions
Trijicon tritium-phosphor lamp aiming reticle glows in lowlight conditions for quick target acquisition
Multi-coated lenses provide superior clarity and light gathering capabilities with zero distortion
Large eye volume allows you to quickly acquire targets, even if you're not positioned perfectly behind the scope
Internally adjustable since only the prism housing moves, the Trijicon ACOG is much more rugged than conventional designs
Forged 7075-T6 aircraft aluminum alloy housing
Waterproof to 500 feet/150 meters. Dry-nitrogen filled to eliminate fogging
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