Trijicon ACOG TA31 4x32 Combat Scope W/Red Dot 3.25 MOA

Experience Unmatched Precision with the ACOG 4x32 Scope

Trijicon ACOG TA31 4x32 Combat Scope W/Red Dot 3.25 MOA delivers battle-tested performance when split-second accuracy matters. Picture yourself on a dawn hunt as fiber optic illumination adapts seamlessly to changing light, letting you track game without missing a moment. Its quick-release mount ensures you stay agile across rifles, keeping your focus sharp from first light to dusk.

Built on Trijicon’s legacy of ruggedness and reliability, this premium optic exemplifies military-grade durability and intuitive operation. Benefit from consistent zero retention, exceptional clarity, and both-eyes-open shooting that boosts situational awareness. Elevate every shot with the confidence that comes from a purpose-designed combat scope.

Ideal for seasoned hunters, tactical shooters, and combat‐focused marksmen who demand reliable target acquisition and exceptional clarity in low-light conditions from a fixed optic. Users praise its bright, crisp sight picture at dawn and dusk, thanks to advanced tritium/fiber-optic illumination that adapts seamlessly to changing light. Perfect for mid-range engagements where rapid, both-eyes-open shooting and a robust, battle-proven design boost confidence in every shot.

Not recommended for beginners or close-quarters enthusiasts who need variable magnification or generous eye relief. It's fixed 4× power can feel restrictive up close, and the 1.5 in eye relief demands precise head positioning—shooters seeking a more forgiving eye box or CQB flexibility may prefer an LPVO or red-dot setup.

Dual-illumination fiber optic & tritium — battery-free, always- auto-brightness ensures a precise aiming point in any light condition.

Bindon Aiming Concept — “both-eyes-open” shooting enhances situational awareness for faster target acquisition and intuitive tracking.

Rugged forged housing — shock-resistant and nitrogen-filled waterproof construction meets military drop and immersion standards for battlefield reliability.

Multi-coated high-definition glass maximizes light transmission and edge-to-edge clarity for crisp visuals from dawn patrol to dusk hunts.

Quick-release mount compatibility — tool-free on/off mounting maintains zero retention and allows rapid optic swaps between platforms.

Bullet-drop compensating reticle — calibrated hold-over points out to 600 m, enabling precise mid-range engagements without manual adjustments

 Strengths: The Trijicon ACOG TA31 delivers exceptional clarity and light transmission, thanks to multi-coated prisms and dual fiber-optic/tri-illumination that powers up in any ambient conditions. Its bomb-proof, nitrogen-filled housing ensures military-grade durability and consistent zero retention in harsh environments, boosting confidence on every shot.

Limitations: The fixed 4× magnification limits versatility for both close-quarters and extended-range shooting, and the 1.5 inches of eye relief demands precise cheek welds—running-and-gunning shooters report slower target acquisition due to its unforgiving eye box. Occasional reticle blooming under extreme contrasts may require improvised shading.

Trijicon ACOG 4x32 Combat Scope - Operations Manual

Trijicon RMR Type 2 - Specification Sheet

What causes lateral zero drift on the ACOG 4x32 Combat Scope?
Tap the turrets firmly after each click and fire a stabilizing shot before zero to prevent drift.

Why is my TA31 Combat Scope fogging internally?
Internal fog indicates a seal breach; check the mounts for gaps and send to Trijicon for nitrogen-purge service.

Which ACOG mount installation guide should I follow?
Use the Quick-Release Picatinny mount with blue Loctite at the specified torque, per the ACOG mount installation guide.

How long does fiber-optic illumination last on this ACOG?
Fiber-optic illumination is battery-free and indefinite; the tritium lamp has a 15-year glow warranty on fiber-optic ACOGs.

What does the Trijicon Unlimited Limited Lifetime Warranty cover?
Covers optical systems and metal structure defects for the lifetime of the original owner; electronics (RMR) covered five years; tritium lamp fifteen years.

Can I use the Bindon Aiming Concept™ with backup iron sights?
Yes. BAC works in conjunction with backup iron sights for rapid target acquisition and seamless transition.