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Questions & Answers
what does this set up weigh? Expert Answer

This Optic weighs 10.5 oz.

by Patrick, Gear Expert, September 2, 2021
Appears these are are MOA options. Any MILs versions available? Thanks. Expert Answer

We currently do not have a MIL Radian option available for the Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR.

by Hunter, Gear Expert, December 7, 2022
Customer Reviews
Helpful Positive Review
Trijicon ECOS combo by Old Man, May 19, 2018
Outstanding optic with an outstanding reticle. Miles better than my issues RCO(ACOG TA31 with “horseshoe” reticle) at work. Comes with BDC for 5.56 M4(100-500M) and M249/M16(600-1000m). Solid base for the RMR(and an auto-adjusting brightness Type2 RM...
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23/24 found this helpful
Helpful Positive Review
Very nice scope by Mark, January 5, 2022
Would have received 5 stars if the RMR could be powered off. It should be in the description that it is constantly powered on as well. I don’t know the battery life, but I guess I will find out, hopefully it is a good long time.
6/15 found this helpful
Helpful Positive Review
Quick, Prompt Service by OscarPhilips, Verified Owner, March 21, 2020
I have not been out to shoot with this scope, but the Optics Planet team was quick in getting my order filled, and even called regarding availability of the model I originally ordered. I was concerned with the concept of green crosshairs on the ACO...
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5/5 found this helpful
Helpful Positive Review
High Quality by John, January 5, 2021
This optic is exactly what I would expect from an ACOG. The crisp green markings are highly visible. The RMR allows for a seamless transition to CQB target acquisition. The QD mount which is included allows for a more than acceptable return to zero w...
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3/3 found this helpful
Helpful Positive Review
Awesome Optics by Gen Lee, Verified Owner, May 1, 2021
One of the best, most battle proven sights out there and it shows. Love the continuous, bright tritium glow on both the ACOG and the RMR. A spectacular combo. The mount included is very rugged and the cross screws fit tight on a standard pic rail, so...
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5/5 found this helpful
Helpful Positive Review
Surprisingly better than the original. by Donald, Verified Owner, September 13, 2024
I did not think I would use the red dot RMR that much, but it is now primary for my rifle because it is so quick and at a perfect height. I just shift down to the main sight for medium range shots of 200-500 yards. With the iron backup sights, it ope...
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5/5 found this helpful
Read All 25 Reviews
3 Models Available
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Product Info for Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR

Imagine aiming down sights sizing up potential targets. Suddenly, a nearby noise alerts you of an enemy's presence. Don't panic. Be prepared to quickly switch from long range engagement to a close quarters situation using the Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR. Built for prime use in the field, these Fixed Power Rifle Scopes by Trijicon require no tools for windage or elevation adjustments since the ECOS features external windage and elevation adjusters. The Trijicon 4x32 3.25 MOA ACOG ECOS Rifle Scope/Red Dot RMR is prepared to handle harsh outdoor conditions as it is waterproof up to 11m. A forged aluminum housing ensures this optic can handle rigorous missions without limiting your mobility. Bright fiber optic and tritium illumination brings a bright aiming point to the battlefield at any time of day. Take on any challenge with a tactical advantage while wielding the Trijicon 4x32 Illuminated ACOG ECOS Rifle Scope/Red Dot RMR.image

Specifications for Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR:

Manufacturer: Trijicon
Objective Lens Diameter: 32 mm
Magnification: 4 x
Reticle Focal Plane: Second Focal Plane (SFP)
Exit Pupil: 8 mm
Finish: Matte
Field of View, Linear: 36.8 ft at 100 yds
Eye Relief: 1.5 in
Color: Cerakote FDE
Adjustment Click Value: 1/2 MOA
Adjustment Type: MOA
Illumination Type: Tritium
Width: 2 in
Adjustment Range: 40 MOA
Lens Material: Glass
Optical Coating: Multi-Coated
Water Resistance Level: Waterproof
Water Resistant Mark: 100 m
Shockproof: Yes
Fogproof: Yes
Package Type: Polymer Hard Case
Included Accessories: Backup Iron Sights, LED 3.25 MOA Red Dot RMR Type 2, Quick Release Mount
Magnification Type: Fixed
Condition: New
Country of Origin: USA
Attachment Type: Quick Detach
Fit: Picatinny

Features of Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR:

  • Fiber optic and tritium illumination
  • Forged aluminum housing
  • External windage and elevation adjusters - no tools required

Package Contents:

  • Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR
  • 1 Trijicon Quick Release Mount
  • 1 Set of backup Iron Sights
  • 1 LENSPEN
  • 1 Lanyard Assembly for Adjuster Caps
  • 1 Trijicon Logo Sticker
  • 1 Manual

Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR Orderable Models

List of Orderable Models

  • Trijicon 4x32 ACOG ECOS, Dual Illuminated Green Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100554 , MPN: TA31-D-100554 , UPC: 719307311824 , Code: TJ-RS-ACGES-100554
  • Trijicon 4x32 ACOG ECOS, Center Illuminated Amber Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100555 , MPN: TA01-D-100555 , UPC: 719307311831 , Code: TJ-RS-ACGES-100555
  • Trijicon 4x32 ACOG ECOS, Dual Illuminated Red Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100553 , MPN: TA31-D-100553 , UPC: 719307311817 , Code: TJ-RS-ACGES-100553

Trijicon 4x32 ACOG ECOS Rifle Scope w/ Backup Iron Sights and Red Dot RMR Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Trijicon 4x32 ACOG ECOS, Center Illuminated Amber Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100555 , MPN: TA01-D-100555-DEMO , Code: TJ-RS-ACGES-100555-DEMO
  • Demo, Trijicon 4x32 ACOG ECOS, Dual Illuminated Green Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100554 , MPN: TA31-D-100554-DEMO , Code: TJ-RS-ACGES-100554-DEMO
  • DEMO, Trijicon 4x32 ACOG ECOS, Dual Illuminated Red Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100553 , MPN: 100553-DEMO , Code: TJ-RS-ACGES-100553-DEMO
  • USED Trijicon 4x32 ACOG ECOS, Dual Illuminated Red Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100553, EDEMO1 , MPN: 100553-EDEMO1 , Code: TJ-RS-ACGES-100553-EDEMO1
  • USED, Trijicon 4x32 ACOG ECOS, Center Illuminated Amber Crosshair 5.56 Reticle w/ Backup Iron Sights, Quick Release Mount & LED 3.25 MOA Red Dot RMR Type 2, Cerakote FDE, 100555 , MPN: TA01-D-100555-EDEMO , Code: TJ-RS-ACGES-100555-EDEMO-IN-B
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