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Trijicon ACOG 5.5x50 BAC Riflescope .223/5.56 BDC Red Chevron Reticle

Trijicon ACOG 5.5x50 BAC Riflescope .223/5.56 BDC Red Chevron Reticle

Regular price $1,599.99 USD
Regular price Sale price $1,599.99 USD
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Trijicon ACOG 5.5×50 BAC Riflescope .223/5.56 BDC Red Chevron Reticle

Features

  • Big‑Objective, Long‑Range ACOG: 5.5× fixed magnification paired with a large 50 mm objective delivers excellent light transmission and target definition at extended distances.
  • Dual‑Illuminated, Battery‑Free: Fiber optics automatically adjust reticle brightness in daylight; tritium lamp glows in low/no light—always on, no batteries to manage.
  • Red Chevron .223/5.56 BDC Reticle: Zero the chevron tip at 100 m; descending stadia give holds for typical 5.56 NATO trajectories. Chevron base subtension (~5.5 MOA ≈ 19" @300 m) aids rapid range estimation on silhouette targets.
  • Bindon Aiming Concept™ Capable: Bright, illuminated reticle supports both‑eyes‑open speed for closer shots while retaining 5.5× precision at distance.
  • Forged 7075‑T6 Aluminum Housing: Monolithic, combat‑proven ACOG chassis built to survive heavy recoil, impact, and harsh environments.
  • Fine External Adjusters: Approx. 0.2 MOA per click (~5 clicks/inch @100 yd) for more precise zeroing than standard 4× models.
  • Deep‑Water Sealed & Nitrogen‑Purged: Waterproof well beyond typical field exposure; resistant to internal fogging.
  • TA51 Flattop Picatinny Mount Included: Ready for AR‑pattern / MIL‑STD‑1913 upper receivers out of the box.
  • Made in USA & Backed by Trijicon Warranty.

Technical Specifications for Trijicon ACOG 5.5×50 BAC Riflescope .223/5.56 BDC Red Chevron Reticle

Specification

Details

Manufacturer

Trijicon

Model / MPN

TA55 / 100173

SKU

TA55

UPC

719307302020

Country of Origin

USA

Magnification

5.5× fixed

Objective Lens Diameter

50 mm

Optical Design

Fixed‑power prism (integral ACOG housing)

Reticle

Red Chevron .223/5.56 BDC (dual‑illum fiber optic / tritium)

Illumination

Fiber (auto daylight) / tritium (night); battery‑free

Eye Relief

2.2″ (56 mm)

Field of View @ 100 yd

18.4 ft (3.5°)

Exit Pupil

9.1 mm

Adjustment Click Value

~0.2 MOA per click (≈5 clicks/inch @100 yd)

Total Adjustment Range

~40 MOA windage & elevation

Parallax Focus

Fixed ~100 m

Overall Length

12.0″ (305 mm)

Weight

25.6 oz (725 g) optic; ~28 oz class w/ TA51 mount installed (approx.)

Housing Material / Finish

Forged aluminum; matte black hard anodize

Optical Coatings

Fully multi‑coated, high‑light‑transmission glass

Waterproof / Fog‑Proof

Sealed; dry‑nitrogen filled; deep‑water rated

Shock Resistance

Duty / combat rated

Mount Interface

TA51 flattop Picatinny thumbscrew adapter (included)

Included Accessories

  • TA55 5.5×50 ACOG optic (Red Chevron .223/5.56 BDC)
  • TA51 flattop Picatinny thumbscrew mount
  • Scopecoat protective cover (package dependent)
  • Lens cleaning tool (LensPen® style)
  • Adjuster cap lanyard / hardware kit
  • Trijicon logo sticker
  • Owner’s manual & warranty documentation

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