Trijicon 4x32 ACOG Riflescope with TA51 Mount ( Green Horseshoe/Dot Dual-Illuminated Reticle)

BH #TR4X32AH223S • MFR #TA31-D-100365
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Trijicon 4x32 ACOG Riflescope with TA51 Mount ( Green Horseshoe/Dot Dual-Illuminated Reticle)
Key Features
  •  Green Horseshoe/Dot Reticle
  • Dual-Illuminated: Tritium & Fiber Optic
  • 32mm Objective Lens Diameter
  • Multicoated Zero-Distortion Optics
Advanced Combat Optical Gunsight, the 4x32 ACOG Dual-Illuminated Riflescope from Trijicon, combines a waterproof and shock-resistant construction with a battery-free dual-illuminated Green Horseshoe reticle. The reticle employs tritium phosphor for illumination at night and fiber optic illumination for daytime. The sight's rugged optical system features zero distortion, multiple anti-reflection coatings, and a 32mm objective aperture. To compensate for wind and ballistic bullet drop, the scope offers windage and elevation adjustments with 1/2 MOA impact point correction.
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Trijicon ACOG 4x32 Overview

Advanced Combat Optical Gunsight, the 4x32 ACOG Dual-Illuminated Riflescope from Trijicon, combines a waterproof and shock-resistant construction with a battery-free dual-illuminated Green Horseshoe reticle. The reticle employs tritium phosphor for illumination at night and fiber optic illumination for daytime. The sight's rugged optical system features zero distortion, multiple anti-reflection coatings, and a 32mm objective aperture. To compensate for wind and ballistic bullet drop, the scope offers windage and elevation adjustments with 1/2 MOA impact point correction.

The housing offers supreme ruggedness and durability: it withstands heavy recoil and deep-water submersion to 328'. To achieve this benchmark, the body is forged from a single piece of 7075-T6 aluminum alloy and coated with Type III hard anodizing finish. It also features an angled sunshade and mounts on a Picatinny style rail via the included TA51 Flattop Mount.

Optical Performance
  • Multicoated optics
  • 4x magnification for a short-to-medium range
  • 32mm Objective lens diameter
  • Angular field of view range is 7°
  • Eye relief: 1.5"
Reticle
  •  Green Horseshoe/Dot reticle
  • Tritium phosphor lamp for night illumination
  • Fiber optic illumination for daylight
  • BDC out to 800 m
Use and Handling
  • Windage and elevation adjustments
  • 1/2 MOA impact point adjustments
Construction Details
  • Angled sunshade
  • Single piece 7075-T6 aluminum alloy housing
  • Type III hard anodizing black matte finish
  • TA51 Flattop Mount is compatible with Picatinny rails
  • Waterproof submersible to 328'
  • Shock-resistant
UPC: 719307307766

Trijicon ACOG 4x32 Specs

Key Specs
Magnification
4x
Objective Lens Diameter
32 mm
Reticle Type
Reticle Type: Horseshoe-Dot
Self-Powered Illumination: Green
Mounting
Picatinny, Weaver
Optics
Magnification
4x
Objective Lens Diameter
32 mm
Exit Pupil Diameter
8 mm
Eye Relief
1.5" / 38 mm
Field of View
37' / 12.3 m @ 100 m
Anti-Reflective Coatings
Yes, Multicoated
Fogproof
Yes
Reticle
Reticle Type
Reticle Type: Horseshoe-Dot
Self-Powered Illumination: Green
Adjustments
Impact Point Correction
Adjustment per Click: 1/2 MOA
General
Mounting
Picatinny, Weaver
Power Source
Tritium
Materials
Aluminum
Dimensions
5.9 x 2" / 15 x 5.1 cm
5.9 x 2.5" / 15 x 6.4 cm (with Mount)
Weight
10.5 oz / 297.5 g
Packaging Info
Package Weight
2.16 lb
Box Dimensions (LxWxH)
8.4 x 8.1 x 5"

Trijicon ACOG 4x32 Reviews

No more sticky tape residue on your sight...

By Tracy
Rated 5 out of 5
Date: 2026-09-25

First things first... Gotta give props to B&H... dreddEx lost my first package, and the people at B&H were awesome and supremly easy to deal with. Kudos to y'all.. If you have never used an acog, you owe it to yourself. It's super intuitive once you get used to "both eyes open" for anything fast and insde about 175m. The adjustability of led intisity takes all the argument out of "the batteries or no batteries debate". (unless you like to be that guy/gal) light weight, just the right ammount of magnification, I would say the eye relief takes some getting used to. Other than that, once you get it ranged, it's pretty much "point & click".. It'll make you burn through some rounds...

Truly next level

By Corey Mimbs
Rated 5 out of 5
Date: 2025-11-10

It doesn't matter how long this optic has been on the market, it continues to excel and be the top of its class.

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