Description
Trijicon ACOG ECOS Features and Performance
The Trijicon ACOG ECOS 4×32 Riflescope with RMR is built for shooters who want a proven fixed-power combat optic paired with a miniature red dot for close-range speed. This configuration combines a 4×32 ACOG with a green crosshair .223/5.56 BDC reticle and a piggybacked 3.25 MOA RMR Type 2 red dot, making it a strong fit for defensive rifles, training carbines, and general-purpose 5.56 setups.
The main optic uses fixed 4x magnification and Trijicon’s BAC design to support fast target acquisition while still giving the shooter magnified capability at distance. Its green crosshair reticle is calibrated for .223/5.56 and uses fiber optic and tritium illumination, so the ACOG portion does not rely on batteries for normal use. The included RMR Type 2 adds a fast close-range aiming option with an LED-powered red dot.
Built for hard use, this optic package combines a compact ACOG housing with a quick-release mount and backup iron sights for added versatility. The Flat Dark Earth finish gives it a distinct appearance while keeping the same field-ready layout that made the ECOS-style ACOG combinations so popular with shooters who want one setup for both distance and up-close work.
With 1.5 inches of eye relief, a 36.8-foot field of view at 100 yards, and a compact overall length, this setup remains a strong option for shooters who want battery-free magnified reticle illumination plus a secondary red dot on top. The Trijicon ACOG ECOS is especially appealing for users who want magnified precision, a fast backup dot, and rugged all-in-one rifle optic performance.
Browse our Trijicon optics selection and shop more riflescopes on our site.
For manufacturer details, see Trijicon’s official product page and browse more options in Trijicon’s ACOG combo lineup.
Details
- Manufacturer Part Number: TA31-D-100554
- MPN: 100554
- Series: ACOG ECOS / RMR Combo
- Main Optic Magnification: 4x
- Main Objective Lens Diameter: 32 mm
- Main Reticle: Green Crosshair, .223/5.56 BDC
- ACOG Illumination: Fiber Optics / Tritium
- Secondary Optic: RMR Type 2
- Secondary Reticle: 3.25 MOA Red Dot
- RMR Illumination: LED
- Finish: Cerakote Flat Dark Earth
- Eye Relief: 1.5 in
- Field of View: 36.8 ft at 100 yds
- Exit Pupil: 8.1 mm
- Length: 5.8 in
- Weight: 15.1 oz
- Mount Included: Quick Release Mount
- Additional Features: Backup Iron Sights Included
- Water Resistance: Waterproof to 100 m
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