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Trijicon ACOG 4x32mm Red Crosshair Reticle – TA31-C-100411

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Trijicon ACOG 4x32mm

This Trijicon ACOG 4x32mm scope provides a dual illuminated reticle using fiber optics and tritium for a bright aiming point in any light condition. It allows the user to instantly switch between supersonic and subsonic ammunition without having to re-zero the optic. The supersonic BDC (out to 600 yds.) has been merged with the subsonic BDC (out to 200 yds.) to provide one set of aiming points for both types of ammunition. The reticle drops are based on an average of commonly available off the shelf subsonic and supersonic ammunition from a 16″ barrel. This BDC reticle is not limited to one or two specific bullets: a majority of commonly available ammunition will fall within the 2 MOA diamond aiming points.

ACOG 4x32mm Features

It features a tritium and fiber optic illuminated reticle that automatically adjusts the brightness based on available light.

Forged 7075-T6 aircraft aluminum alloy housing it provides for a nearly indestructible sighting system.

The ACOG can be used as a CQB sight when shooting “both eyes open,” utilizing the Bindon Aiming Concept (see below).

Fixed Magnification

Combat Proven

Waterproof and Shock Resistant

Limited Lifetime Warranty


Weight 15.1 oz. (428.08g)
Magnification 4x
Objective Size 32mm
Reticle Pattern Crosshair
Day Reticle Color Red
Night Reticle Color Red
Bullet Drop Compensating (BDC) Yes
Caliber 300 BLK
Illumination Source Fiber Optics & Tritium
Power Source Fiber Optics & Tritium
Eye Relief 1.5 in. (38.1mm)
Exit Pupil 0.32 in. (8.13mm)
Field of View (degrees)
Field of View (feet) 36.8 ft. @ 100 yds. (12.27m @ 100m)
Mount Flattop Thumbscrew Mount (TA51)
Housing Material Forged Aluminum
Finish Matte Black