Trijicon 4×32 ACOG Dual-Illuminated Riflescope (Matte Black, 300 Blackout Green Crosshair) MFR # TA31-C-100413


The 4×32 ACOG Dual-Illuminated Riflescope from Trijicon features a battery-free illuminated ballistic reticle and a durable waterproof housing to create a versatile weapon sight that is well-suited for use in a wide range of weather and lighting conditions. This Advanced Combat Optical Gunsight (ACOG) sight is outfitted with a green crosshair reticle that has bullet drop compensation stadia on the lower vertical hair that are specifically calibrated for 300 Blackout caliber ballistics. Anti-reflection broadband fully multicoated optics maximizes light transmission to provide bright and clear views with limited distortion.

Trijicon’s battery-free dual-illumination reticle system employs a tritium phosphor lamp for low-light and night targeting, as well as a fiber optic illumination that automatically adjusts reticle brightness when operating in daylight. The reticle’s aiming point can be adjusted in 1/2 MOA increments, and an internal adjustment mechanism allows the ACOG to reliably hold zero. The ACOG is outfitted with a TA51 mount that has two thumbscrews for clamp-on attachment to a Picatinny rail. Complementing the ACOG’s optical system and caliber-specific ballistic reticle is a nitrogen-filled, aluminum housing with a scratch and corrosion-resistant hard-anodized matte-black finish that provides the durability needed for reliable performance in a wide range of shooting conditions.

Optical Performance

4x magnification
32mm diameter objective
Fully multicoated optics
Broadband lens coating
7° angle of view
1.5″ eye relief


Green dual-illuminated crosshair reticle
Ballistic drop compensation (BDC) reticle for 300 Blackout caliber
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
The 2 MOA diamonds offer a balance of speed and versatility based on the unique performance of the 300 Blackout caliber
The drops in MOA for each aiming point are provided for users who wish to develop their own handloads for use on firearms with a barrel of 16″ or shorter, or for those who wish to deviate from the recommended zero distances
Battery-free illumination uses fiber optics or tritium
Fiber optics: Focuses, channels, and filters ambient light to illuminate the reticle
Tritium isotope: Interacts with a phosphors membrane in the system to create illumination for the reticle

Use and Handling

1/2 MOA impact point adjustments
Includes TA51 mount for AR-style flattop rail

Construction Details

Nitrogen-filled for fogproof and waterproof performance
Waterproof to 328′ (100m)
7075-T6 aluminum alloy housing
Matte black scratch and corrosion-resistant hard anodized finish
9.9 oz weight (without mount)
Made in the USA



Includes Free Value: $80.00

Smith Optics Aegis Arc Compact Protective Eyewear – Field Kit (Black)

Product Highlights

Green Crosshair BDC Reticle
Ballistic Reticle for 300 Blackout
Tritium/Fiber Optic Reticle Illumination
Nitrogen-Filled, Water and Fogproof
Hard-Anodized Aluminum Housing
1/2 MOA Impact Point Correction
1.5″ Eye Relief
TA51 Flattop Mount
Made in USA


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