Trijicon 4x32mm ACOG Dual Illumination Red Crosshair Reticle with 3.25 MOA RMR Sight Flat…
- Rifle Scope
- 32 mm
- 4x
- 4x
A combat-tested magnified optic that performs well for long-range shooters willing to work around its short eye relief, so buy from a source you trust given at least one counterfeit report.
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How it ranks among the 359 rifle scopes we track
4.2★ across 8 Amazon ratings, Bayesian-smoothed toward the category average.
8 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 359 rifle scopes we track - how the scorecard works · full rifle scopes data report. Confidence: limited - limited rating history.Last refreshed Jun 22, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A 4x32 ACOG with a battery-free tritium and fiber optic reticle comes paired with a mounted RMR Type 2 red dot, giving one housing both a magnified long-range sight and a fast close-quarters option. The aluminum-alloy housing carries a Flat Dark Earth Cerakote finish built to combat-use standards.
Reviewers split along genuine use cases: Marine Corps and long-range shooters found it does exactly what a combat-tested ACOG is built for, while shooters mounting it low over a Tavor bullpup or dealing with astigmatism ran into fit and eye relief problems specific to their setup. One reviewer also reported receiving a counterfeit unit with the wrong finish color and no Trijicon markings, a seller authenticity issue worth flagging before you buy.
- Battery-free tritium and fiber optic reticle
- 7075-T6 aluminum alloy housing, FDE finish
- RMR Type 2 sight included and mounted
- Both eyes open Bindon Aiming Concept design
Who it's for
Fits shooters who want a rugged, battery-free magnified optic for mid to long range work and are comfortable with the ACOG's short eye relief and narrow field of view. Not a match for anyone with astigmatism, since the tritium reticle can appear blurry regardless of glass quality, and returns on this item are restricted.
What buyers say
From Amazon customer reviews.
A buyer with astigmatism found the tritium reticle blurry regardless of mounting, and learned only after purchase that the item is non-returnable once the tritium seal is engaged. Mounted on a Tavor bullpup, one reviewer reported the RMR portion could only zero at 50 yards, with point of impact low at closer range and eye relief tight enough to interfere with backup iron sights. A former Marine praised its accuracy out to 1000 yards when used for its intended long-range purpose, while another reviewer reported receiving a unit with the wrong finish color and no Trijicon markings at all.
Strengths and trade-offs
Drawn from this product's published specifications.
- Battery-free reticle brightens automatically with light
- Reported accurate to long range when properly mounted
- Combines magnified and red dot sighting in one unit
- Short eye relief, narrow field of view
- Tritium reticle can be unusable for astigmatism
- Non-returnable once tritium seal is broken
- At least one report of a counterfeit unit
Specifications
| Brand | Trijicon |
|---|---|
| Model | TA31-D-100553 |
| Dimensions & fit | |
| Objective Lens Diameter | 32 mm |
| Item Weight | 1 pound |
| Construction & materials | |
| Material Type | Metal |
| Color | FDE w/ RMR Type 2 |
| Compatibility & installation | |
| Mounting Type | Quick Release Mount |
| Compatible Devices | Rifle |
| Included components | |
| Unit Count | 1 |
| Included Components | 4x32mm Scope, 3.25 RMR Type 2 Sight, battery, Mount, Lenspen, 1 set of backup Iron sights, Lanyard for Adjuster Cap, Logo Sticker, Manual,Warranty Card |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Magnification Minimum | 4x |
| Magnification Maximum | 4x |
| Sport Type | Hunting |
| Reticle Type | Crosshair |
| Night vision | No |
| Product Style | ECOS Red 5.56 Crosshair Reticle |
| Field Of View | 36.8 Feet |
| Item Type Name | Trijicon, 4x32mm ACOG Dual Illumination Scope -, Red Crosshair Reticle with 3.25 MOA RMR Type 2 Sight, Flat Dark Earth |
Other Trijicon rifle scopes
How it compares
This product against the closest alternatives we track in rifle scopes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Trijicon 4x32mm ACOG Dual Illumination Red Crosshair Reticle with 3.25 MOA RMR Sight Flat…This product | 4.2 / 5 | 8 | 2.7 / 5 |
| UTG 3-12X44 30mm Compact ScopeUTG | 4.5 / 5 | 3,000 | 4.4 / 5 |
| Vortex Optics Diamondback Second Focal PlaneBrand | 4.7 / 5 | 1,500 | 4.3 / 5 |
| PINTY Tactical Rifle Scope Combo: Illuminated OpticsPinty | 4.4 / 5 | 1,100 | 4.3 / 5 |
| Firefield RapidStrike 1-6x24 SFP Riflescope KitFirefield | 4.5 / 5 | 900 | 4.3 / 5 |
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Questions about the Trijicon TA31-D-100553
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Trijicon ACOG TA31-D-100553 need batteries?
No. The reticle illuminates using tritium and fiber optics that respond to ambient light, with no battery required.
Can I return the Trijicon ACOG if the reticle doesn't work for my eyes?
According to one buyer's experience, Amazon lists this as non-returnable because of the tritium component, so try to confirm reticle visibility, including any astigmatism concerns, before ordering.
How does this ACOG mount on a bullpup rifle like a Tavor?
One reviewer reported the RMR could only zero at 50 yards on a Tavor, with impact drifting low at closer distances and eye relief tight enough to interfere with the backup iron sights.