Trijicon ACOG 5.5x50 Rifle Scope Red Chevron .308 TA55A
Trijicon
$1,705.69
(No reviews yet)
Write a Review
Trijicon
Trijicon ACOG 5.5x50 Rifle Scope Red Chevron .308 TA55A
The Trijicon ACOG 5.5x50 Red Chevron .308 Flat-Top is a battle-proven, fixed-power riflescope engineered for precision engagements at distance without sacrificing close-quarters responsiveness — a favorite among military, law enforcement, and serious civilian shooters alike.
- 5.5x magnification with a 50mm objective lens for exceptional light gathering
- Red chevron BDC reticle calibrated specifically for .308 Winchester / 7.62x51mm
- Tritium/fiber optic dual illumination — no batteries required, ever
- Flat-top (Picatinny/A1913) mount for direct, return-to-zero installation
- Aircraft-grade 7075-T6 aluminum housing that shrugs off hard use and recoil
- Both-eyes-open shooting capability for enhanced situational awareness in the field
Who This Is For
This ACOG is purpose-built for .308/7.62x51 rifle owners — including AR-10, DPMS, SCAR 17, and similar platforms — who demand a rugged, always-ready optic for hunting, precision shooting, or duty use. If you want a no-compromise, no-battery optic that performs from dawn to dusk and into darkness, the 5.5x50 Red Chevron is your answer.
Specifications
| Model | TA55A (Red Chevron, .308, Flat-Top) |
|---|---|
| Magnification | 5.5x |
| Objective Lens | 50mm |
| Reticle | Red Chevron BDC (.308 / 7.62x51) |
| Illumination | Tritium / Fiber Optic (battery-free) |
| Eye Relief | 1.5 in (38.1mm) |
| Field of View | 18.5 ft @ 100 yards |
| Click Value | 0.5 MOA |
| Mount | Flat-Top / Picatinny (A1913) |
| Housing Material | 7075-T6 Aluminum Alloy |
| Length | 9.1 in (231mm) |
| Weight | 23.2 oz (with mount) |
| Made in USA | Yes |
Frequently Asked Questions
Is this ACOG compatible with my AR-10 or other .308 flat-top rifle?
Yes. The TA55A is designed specifically for flat-top (Picatinny/MIL-STD-1913) receivers and is calibrated for .308 Winchester / 7.62x51mm ballistics. It is an excellent match for AR-10 pattern rifles, DPMS, Ruger SR-762, FN SCAR 17, and similar platforms. No additional adapter is needed for standard flat-top rails.
How does the tritium/fiber optic illumination work, and will it ever go dark?
The ACOG uses a dual-illumination system that combines a tritium phosphor lamp (self-luminous, no batteries needed) with a fiber optic cable that harvests ambient light. In bright daylight, the fiber optic dominates and provides a vivid red reticle. As light fades, the tritium element takes over, keeping the chevron visible even in total darkness. Tritium has a half-life of approximately 12 years, so the reticle will remain usable for well over a decade of service.
What is the effective range of the red chevron BDC reticle for .308?
The red chevron reticle in the TA55A is ballistically matched to the .308 Winchester / 7.62x51mm cartridge at standard velocities (approximately 2,600–2,800 fps with a 147–168 gr projectile). The BDC stadia lines are calibrated to provide holdover references out to 800 meters, making this optic well-suited for precision rifle work beyond typical carbine engagement distances. Always confirm zero at your specific zero distance before field use.
