Trijicon ACOG 5.5x50 BAC Riflescope .308 Red Chevron BDC – TA55A
Trijicon
Trijicon ACOG 5.5x50 BAC Riflescope .308 Red Chevron BDC – TA55A
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Returns
Unused items in their original packaging may be returned within 30 days of delivery. Optics that have been mounted or used may be inspected. Email support@dnrsports.com to start a return. Read our full Return & Refund Policy.
Warranty Information
Products are covered by their manufacturer's warranty; coverage and length vary by brand. We'll help you start a claim if needed — email support@dnrsports.com. Read our Warranty page.
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Overview
The Trijicon ACOG 5.5x50 BAC Riflescope .308 Red Chevron BDC is a Trijicon rifle scope with 5.5x fixed magnification and 50 mm objective.
How It Compares
Compare with the Trijicon ACOG 5.5x50 BAC Riflescope .223/5.56 BDC Red Chevron Reticle. Browse all rifle scopes or Trijicon rifle scopes.
Ideal For
- Shooters who want a fixed 5.5x — one magnification, nothing to knock off zero
- Low-light work, where the 50 mm objective is still gathering light at dusk
- Shooting into shadow or at first light, with the Red Chevron BDC reticle illuminated
Key Features
- Magnification / Objective: 5.5x fixed
- Objective: 50 mm
- Reticle: Red Chevron BDC; chevron tip zero at 100 m; chevron base width 5.53 MOA = 19 in at 300 m for silhouette range estimation
- Illumination: Dual illuminated: fiber optics (day) + tritium (night); battery-free
- Adjustment Range: 5 clicks per inch @ 100 yards (~0.2 MOA/click)
- Field of View: 18.4 ft @ 100 yds (3.5 deg)
- Eye Relief: 2.2 in (55.88 mm)
- Exit Pupil: 0.35 in (8.89 mm).
About This Model
- Reticle: Red Chevron BDC; chevron tip zero at 100 m; chevron base width 5.53 MOA = 19 in at 300 m for silhouette range estimation
- Illumination: Dual illuminated: fiber optics (day) + tritium (night); battery-free
- Warranty: Trijicon Limited Lifetime Warranty
What's Included
- Thumbscrew flattop adapter (TA51); 5.5x50 Scopecoat (TA65); lenspen (TA56); lanyard assembly for adjuster caps (TA71E); logo sticker (PR15); ACOG
Technical Specifications
Magnification / Objective |
5.5x fixed |
Objective |
50 mm |
Reticle |
Red Chevron BDC; chevron tip zero at 100 m; chevron base width 5.53 MOA = 19 in at 300 m for silhouette range estimation |
Caliber Calibration |
.308 / 7.62 nato BDC |
Illumination |
Dual illuminated: fiber optics (day) + tritium (night); battery-free |
Adjustment Range |
5 clicks per inch @ 100 yards (~0.2 MOA/click) |
Eye Relief |
2.2 in (55.88 mm) |
Exit Pupil |
0.35 in (8.89 mm). |
Field of View |
18.4 ft @ 100 yds (3.5 deg) |
Length |
12.0 in (LxWxH 12 x 2.5 x 2.7 in) |
Weight |
25.6 oz (725.75 g) |
Housing |
Forged aluminum, matte black |
Mount |
TA51 flattop thumbscrew adapter (included) |
Water Resistance |
Waterproof, dry-nitrogen filled; exceeds military standards |
SKU / MPN / UPC |
TA55A / TA55A / 719307302037 |
Warranty
Trijicon back this with their Limited Lifetime Warranty: the optical system and metal structure are covered against defects in materials and workmanship for the lifetime of the original owner. The tritium lamp is separately warranted to glow for fifteen years from date of manufacture.
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Which reticle does it have?
Red Chevron BDC; chevron tip zero at 100 m; chevron base width 5.53 MOA = 19 in at 300 m for silhouette range estimation.
Is the reticle illuminated?
Dual illuminated: fiber optics (day) + tritium (night); battery-free.
What does it mount to?
TA51 flattop thumbscrew adapter (included).
How much eye relief does it give?
2.2 in (55.88 mm).
Is this a genuine Trijicon product?
Yes — factory-new Trijicon, supplied through US distribution. The part number is TA55A and the barcode is 719307302037.
What warranty does it carry?
Trijicon back this with their Limited Lifetime Warranty: the optical system and metal structure are covered against defects in materials and workmanship for the lifetime of the original owner. The tritium lamp is separately warranted to glow for fifteen years from date of manufacture.
Technical Specifications
- SKU
- TA55A
- UPC
- 719307302037
- Manufacturer
- Trijicon
- Model / MPN
- TA55A / 100175
- Country of Origin
- USA
- Magnification
- 5.5× fixed
- Objective Lens Diameter
- 50 mm
- Optical Design
- Fixed‑power prism (integral ACOG housing)
- Reticle
- Red Chevron .308/7.62 BDC (dual‑illum fiber optic / tritium)
- Illumination
- Fiber (day) / 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
- 5 clicks/inch @100 yd (~0.2 MOA per click)*
- Total Adjustment Range
- ~40 MOA windage & elevation
- Parallax Focus
- Fixed ~100 m
- Overall Length
- 12.0″ (305 mm)
- Weight
- 25.6 oz (optic); ~28 oz class w/ TA51 mount (approx.)
- Housing Material / Finish
- Forged aluminum; matte black hard anodize
- Optical Coatings
- Fully multi‑coated, high‑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)