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Questions & Answers
Is this for only AR-15 platform, or can it be used with AR-10 as well?

You’ll want the .308 version.

by Chachi, Verified Owner, March 18, 2021
Customer Reviews
Helpful Positive Review This big boy doesn't get enough love - fantastic scope by Dan, Verified Owner, December 9, 2021
The TA55 might be the most underrated ACOG. Yes it looks a little weird on the rail but it's exceptionally well built, and it's as easy to mount as the TA11 (I think the TA11 and 55 share a lot in common with their enhanced eye relief and slightly n...
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2/2 found this helpful
Helpful Positive Review good things happen to quality products by cSquared, Verified Owner, December 11, 2021
Great scope super clear won’t be doing any CQC with this Target identification. Everyone who looks through it says how clear the glass is. Have a 400 dollar 1-8 and this thing poops on that all Day long
1/4 found this helpful
Helpful Positive Review TRIJICON TA55 by Legacy Reviewer, May 14, 2014
love TRIJICON products due construction or because they are built to last. the thought process or desigh TRIJICON has put into their products has been through the roof, if many more US companies would benchmark TRIJICON then they would be amazed of p...
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8/10 found this helpful
Helpful Positive Review Another Super Scope from Trijicon by PTH, February 26, 2016
This 5.5 x 50 ACOG joins the other Trijicon scopes on my rifles. I am a happy customer because of the durability and utility of these scopes. My eyesight is not the best and I rely on ACOG's at my club's 300-yard range. The only thing that I'm undeci...
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9/9 found this helpful
Helpful Positive Review great scope. by kev, November 11, 2016
Agreed. Nighttime visibility is surprisingly good. Magnification seems much higher that 5.5. Rock solid even with the trijicon quick connects. Fiber optic rail gathers a lot of light. Tritium works well with no light. I like the scope.
2/2 found this helpful
Read All 5 Reviews

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Reticle: Illuminated Red TA55 Chevron Illumination Color: Red Color: Black Weight: 25.6 ozAdjustment Click Value: 1/5 MOAAdjustment Type: MOA Illumination Type: Fiber Optics/Tritium Included Accessories: 1 5.5x50 Scopecoat Fit TA65 , 1 Flattop Mount Fit TA51 , 1 Lanyard Assembly for Adjuster Caps Fit TA71E , 1 LensPen Fit TA56 , 1 Manual , 1 Trijicon Logo Sticker Fit PR15 , 1 Warranty Card Condition: New

Code: TJ-RS-TA55-EE

MPN: TA55

UPC: 719307302020

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Product Info for Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight

Trijicon ACOG 5.5x50 Gunsight with Red Chevron BAC Flattop .223 Reticle TA55 includes Trijicon Flat Top Adapter. The chevron reticle of the Trijicon Rifle Scope is designed to be zeroed using the tip at 100 meters. The width of the chevron at the base is 5.53 MOA which is 19" at 300 meters. This allows range estimation for silhouette targets.image

Trijicon TA55 5.5 x 50mm ACOG Advanced Combat Optical Gunsights hit fast in any light. Trijicon ACOG 5.5 x 50 Rifle Scopes are internally-adjustable, compact telescopic sights with tritium illuminated reticle patterns for use in low light or at night. Bindon Aiming Concept (BAC) models feature bright daytime reticles using fiber optics which collect ambient light. Trijicon 5.5x50 ACOGs combine traditional, precise distance marksmanship with close-in aiming speed. Although Trijicon ACOG 5.5 x 50mm Rifle Scopes TA-55 have many features which are very advantageous for military use, they were developed by Trijicon without government funding. Designed for use with the M16 family, every feature of its mechanical and optical design was chosen for a single purpose: to provide increased hit potential in all lighting conditions - without failure-prone batteries.

Specifications for Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight:

Manufacturer: Trijicon
Objective Lens Diameter: 50 mm
Magnification: 5.5 x
Reticle: Illuminated Red TA55 Chevron
Exit Pupil: 9.1 mm
Illumination Color: Red
Field of View, Linear: 18.4 ft at 100 yds
Field of View, Angle: 3.5 degrees
Eye Relief: 2.2 in
Color: Black
Weight: 25.6 oz
Adjustment Click Value: 1/5 MOA
Length: 12 in
Adjustment Type: MOA
Illumination Type: Fiber Optics/Tritium
Fabric/Material: Forged Aluminum
Shockproof: Yes
Fogproof: Yes
Package Type: Polymer Hard Case
Included Accessories: 1 LensPen Fit TA56, 1 Warranty Card, 1 Manual, 1 Trijicon Logo Sticker Fit PR15, 1 Lanyard Assembly for Adjuster Caps Fit TA71E, 1 5.5x50 Scopecoat Fit TA65, 1 Flattop Mount Fit TA51
Magnification Type: Fixed
Condition: New
Country of Origin: USA
Housing/Frame Material: Forged Aluminum
Attachment Type: TA51

Features of Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight:

  • Always On, Always Ready: Most ACOG models are battery free, featuring a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light.
  • Take Control: Several ACOG models are designed with a user-adjustable brightness setting powered by a single AA battery. The 3.5x35 LED and 4x32 LED models both offer six adjustable brightness settings.
  • Rugged, Reliable Housing Design: Fixed-power design allows for minimal moving parts to create a nearly indestructible sighting system.
  • "Both Eyes Open" Design: "Both eyes open" shooting using Trijicon's Bindon Aiming Concept (BAC) feature allows for improved situational awareness.
  • Outstanding Clarity: The quality of the glass and multi-coated lenses maximize light-gathering capabilities and clear field of view with zero distortion.
  • Exact Target Distances & Holds: Most ACOG models feature a bullet drop compensating and target-ranging reticle for decisive aiming.
  • Combat Proven: No other magnified optic has been used more in combat than the ACOG.
  • Shock-Resistant: Proven to withstand recoil from a .22LR to a .50BMG and everything in between. Easily passes U.S. Military drop test requirements.
  • Waterproof: Exceptional waterproof performance that exceeds military standards. Dry nitrogen-filled to eliminate fogging. This optic is tested to withstand and perform in extreme cold and heat with dry-nitrogen filled housing that mitigates fogging.

Package Contents:

  • Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight
  • Thumbscrew Flattop Adapter (TA51)
  • 5.5x50 Scopecoat (TA65)
  • LENSPEN (TA56)
  • Lanyard Assembly for Adjuster Caps (TA71E)
  • Trijicon Logo Sticker (PR15)
  • ACOG Manual
  • Warranty Card

Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight Orderable Models

List of Orderable Models

Trijicon ACOG 5.5x50 Illuminated BAC Flattop Rifle Scope w/Mount, Red Chevron .223 Reticle , MPN: TA55 , UPC: 719307302020 , Code: TJ-RS-TA55-EE

Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight Unavailable & Discontinued Models

List of Unorderable Models

Open Box, Dealer Demo, Trijicon ACOG 5.5x50 Illuminated BAC Flattop Rifle Scope w/Mount, Red Chevron .223 Reticle , MPN: TA55-DMO , Code: TJ-RS-TA55-DMO
DEMO, Trijicon ACOG 5.5x50 Illuminated BAC Flattop Rifle Scope w/Mount, Red Chevron .223 Reticle , MPN: 100173-DEMO , Code: TJ-RS-TA55-DEMO
Trijicon TA55 ACOG 5.5x50 Rifle Scopes Advanced Combat Optical Gunsight - Red Chevron BAC Flattop .223 Reticle and TA51 Mount Rifle Scope with FREE Gerber Suspension Multi-Plier , MPN: TA55-KIT , Code: TJ-RS-TA55-KIT
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