• Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle Rifle Scope Trijicon
  • Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle Rifle Scope Trijicon
  • Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle Rifle Scope Trijicon
  • Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle Rifle Scope Trijicon
  • Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle Rifle Scope Trijicon
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Trijicon

Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle

Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle

$1,699.99 USD
$1,699.99 USD
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Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle

Features

  • Dual‑Illuminated, Battery‑Free ACOG: Fiber optics auto‑adjust reticle brightness in daylight; tritium lamp glows in low/no light—no batteries or switches.
  • Integrated ECOS Dual‑Sighting System: Includes factory‑mounted Trijicon RMR® Type 2 LED Red Dot (3.25 MOA) for instant, heads‑up CQB transitions without changing cheek weld.
  • .223/5.56 BDC Red Crosshair Reticle: Calibrated bullet‑drop stadia matched to common 5.56 NATO carbine ballistics when zeroed at 100 m; fine crosshair promotes precise holds at distance.
  • Bindon Aiming Concept™ Speed: True both‑eyes‑open shooting at 4×; maintain situational awareness while driving the chevron/crosshair on target.
  • External, Tool‑Less Adjusters: Finger‑adjust windage & elevation (1/2 MOA clicks) and stay waterproof without turret caps—ideal for duty use.
  • Battle‑Proven Durability: Forged aluminum housing, Cerakote® FDE finish, shock‑rated, waterproof, and fog‑proof—designed to survive combat environments.
  • Quick‑Detach Combat Mount: Supplied Trijicon Quick Release Picatinny mount lets you remove / re‑attach with repeatable zero; built‑in backup iron sights provide tertiary aiming option.
  • Complete Deployment Kit: Ships ready for the field with RMR, mount, irons, and service accessories.
  • Made in USA & Backed by Trijicon Warranty.

Technical Specifications for Trijicon ACOG 4×32 BAC ECOS Riflescope .223/5.56 BDC Red Crosshair Reticle

Specification

Details

Manufacturer

Trijicon

Model / MPN

TA31‑D‑100553 / 100553

SKU

TA31‑D‑100553

UPC

719307311817

Country of Origin

USA

Magnification

4× fixed

Objective Lens Diameter

32 mm

Optical Design

Fixed‑power prism sight (no maintube)

Reticle

Red Crosshair .223/5.56 BDC (dual‑illuminated fiber optic / tritium)

Illumination

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

Piggyback Optic

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

Eye Relief

1.5″ (38 mm)

Field of View @ 100 yd

36.8 ft (7°)

Exit Pupil

8.0 mm

Adjustment Click Value

1/2 MOA per click (external, tool‑less)

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″ ACOG optic body)

Weight

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

Finish / Color

Cerakote® Flat Dark Earth (FDE)

Waterproof / Fog‑Proof

Sealed; waterproof (service‑rated); nitrogen‑purged

Shock Resistance

Combat‑rated (tested on 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 Red Crosshair 5.56 BDC)
  • Trijicon RMR® Type 2 3.25 MOA Red LED (factory mounted)
  • Trijicon Quick Release Picatinny mount (Cerakote FDE)
  • Backup iron sight set (mount‑top)
  • LensPen® cleaning tool
  • Adjuster cap lanyard assembly
  • Trijicon logo sticker
  • Owner’s manual / warranty card

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