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Trijicon ACOG 4×32 BAC ECOS Riflescope 5.56 BDC Green Crosshair Reticle Rifle Scope Trijicon
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Trijicon ACOG 4×32 BAC ECOS Riflescope 5.56 BDC Green Crosshair Reticle

$1,699.99
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Trijicon ACOG 4×32 BAC ECOS Riflescope 5.56 BDC Green Crosshair Reticle

Features

  • Dual‑Illuminated, Battery‑Free ACOG: Fiber optics automatically regulate reticle brightness in daylight; tritium lamp provides a glow in low/no light—no batteries required in the ACOG body.
  • ECOS Dual‑Sighting System: Factory‑mated Trijicon RMR® Type 2 LED Red Dot (3.25 MOA) mounted atop the ACOG for instant, heads‑up CQB transitions without changing cheek weld.
  • 5.56 BDC Green Crosshair Reticle: Highly visible green crosshair with ballistic drop stadia scaled for 5.56 NATO / .223 trajectories (100 m zero) for rapid holds to extended distance.
  • Backup Iron Sights & Quick‑Release Mount: Integrated mini iron sights on the included Trijicon QD Picatinny mount provide a tertiary aiming option; fast on/off with repeatable zero.
  • Bindon Aiming Concept™ Speed: True both‑eyes‑open shooting at 4× magnification—maintain situational awareness while driving the crosshair on target.
  • Battle‑Proven Durability: Forged aluminum housing, Cerakote® Flat Dark Earth finish, shock‑resistant, waterproof, fog‑proof—built for combat environments.
  • External Tool‑Less Adjusters: 1/2 MOA windage & elevation clicks; no turret caps needed.
  • Compact, Lightweight Deployment Kit: Designed for carbines where height, balance, and weight matter.
  • Made in USA & Backed by Trijicon Warranty.

Technical Specifications for Trijicon ACOG 4×32 BAC ECOS Riflescope 5.56 BDC Green Crosshair Reticle

Specification

Details

Manufacturer

Trijicon

Model / MPN

TA31‑D‑100554 / 100554

SKU

TA31‑D‑100554

UPC

719307311824

Country of Origin

USA

Magnification

4× fixed

Objective Lens Diameter

32 mm

Optical Design

Fixed‑power prism sight (no maintube)

Reticle

Green Crosshair 5.56 BDC (dual‑illuminated fiber optic / tritium)

Illumination (ACOG)

Auto fiber (day) / tritium (night); battery‑free

Piggyback Optic

Trijicon RMR® Type 2 LED Red Dot, 3.25 MOA (battery powered, CR2032)

Eye Relief

1.5″ (38 mm)

Field of View @ 100 yd

36.8 ft (7°)

Exit Pupil

8.1 mm

Adjustment Click Value

1/2 MOA per click

Total Adjustment Range

~40 MOA windage & elevation

Parallax Focus

Fixed at 100 m (≈109 yd)

Overall Length

~7.3″ assembled ECOS kit (approx. 5.8–6.2″ ACOG optic body)

Weight

~15.1 oz ACOG optic; ~20 oz class complete ECOS kit (ACOG + RMR + mount/irons)

Finish / Color

Cerakote® Flat Dark Earth (FDE)

Waterproof / Fog‑Proof

Sealed; nitrogen‑purged; service‑rated waterproof

Shock Resistance

Combat‑rated (duty calibers)

Mount Interface

Trijicon Quick‑Release Picatinny mount w/ integrated backup iron sights (included)

Included Accessories (ECOS Kit Contents)

  • 4×32 ACOG (dual‑illum Green Crosshair 5.56 BDC)
  • Trijicon RMR® Type 2 3.25 MOA Red LED (factory mounted)
  • Trijicon QD Picatinny mount w/ integrated backup iron sights
  • Lens cleaning tool
  • Adjustment / hardware kit
  • Trijicon logo sticker
  • Owner’s manual & warranty documentation

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