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Description
A fixed 4x32 ACOG riflescope with a tritium and fibre optic illuminated red crosshair BDC reticle for .223 / 5.56 rifles, aimed at professional users.
This ACOG combines 4x magnification with a 32mm objective and a red crosshair reticle whose bullet drop compensation is calibrated for .223 / 5.56.
The reticle is dual-illuminated by fibre optics and tritium for a bright aiming point in any light condition; the ranging reticle compensates for bullet drop out to 600 metres without manual adjustments.
It comes with the Flattop Thumbscrew Mount (TA51) and has a forged aluminium housing in a Sniper Gray Cerakote finish.
Key features
- Dual illumination — The tritium and fibre optic reticle adjusts its brightness automatically to the available light.
- Ranging BDC reticle — The bullet drop compensating, target-ranging reticle provides holds out to 600 metres for .223 / 5.56 without touching the adjusters.
- Both eyes open — The Bindon Aiming Concept (BAC) supports shooting with both eyes open for improved situational awareness.
- Fixed-power design — A fixed 4x magnification keeps moving parts to a minimum for a rugged, reliable sighting system.
- Multi-coated optics — Multi-coated lenses maximise light gathering and give a clear field of view.
- Shock-resistant housing — The forged aluminium housing is proven to withstand recoil from .22LR to .50BMG and passes U.S. Military drop test requirements.
- Waterproof and fog-free — The dry nitrogen-filled housing is waterproof and mitigates fogging in extreme cold and heat.
Typical applications
- Duty and patrol rifles in .223 / 5.56 that need fast ranging and holds at distance.
- Law enforcement and military users who want a self-illuminated reticle that adapts to changing light.
- Flattop rifles where a quick-attach thumbscrew mount is preferred.
Technical specifications
| Length × width × height | 5.98 in x 2 in x 2.3 in (151.89mm x 50.8mm x 58.42mm) |
| Weight | 14.9 oz. (422.41g) |
| Magnification | 4x |
| Objective size | 32mm |
| Reticle pattern | Crosshair |
| Day reticle colour | Red |
| Night reticle colour | Red |
| Bullet drop compensation (BDC) | Yes |
| Calibre | .223 / 5.56 |
| Illumination source | Fiber Optics & Tritium |
| Power source | Fiber Optics & Tritium |
| Adjustment | 2 clicks per in. @100 yards |
| Eye relief | 1.5 in. (38.1mm) |
| Exit pupil | 0.32 in. (8.13mm) |
| Field of view (degrees) | 7° |
| Field of view (distance) | 36.8 ft. @ 100 yds. (12.27m @ 100m) |
| Mount | Flattop Thumbscrew Mount (TA51) |
| Housing material | Forged Aluminum |
| Finish | Sniper Gray |
| Submersion depth | 66 ft. (20m) |
In the box
- 1 × ACOG® 4x32 BAC Riflescope - .223 / 5.56 BDC — Red Crosshair Reticle, Thumbscrew Mount, Sniper Gray Cerakote, Tritium / Fiber Optics Illuminated
- Thumbscrew Flattop Adapter (TA51)
- 4x32 Scopecoat (TA63)
- LENSPEN (TA56)
- Lanyard Assembly for Adjuster Caps (TA71E)
- Trijicon Logo Sticker (PR15)
- ACOG BAC Manual
- Warranty Card
Model information
| Brand | Trijicon |
| Model | ACOG® 4x32 BAC Riflescope - .223 / 5.56 BDC — Red Crosshair Reticle, Thumbscrew Mount, Sniper Gray Cerakote, Tritium / Fiber Optics Illuminated |
| MPN | TA31-C-100370 |







