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Description
A 4x32 ACOG ECOS with a 3.25 MOA RMR Type 2 red dot, for users who need magnified and close-range aiming on one rifle.
This combination pairs a 4x32 Trijicon ACOG with a Trijicon RMR Type 2 automatic LED red dot of 3.25 MOA, mounted on top of the ACOG. The shooter can choose between the magnified 4 power ACOG for precise aiming at longer distances and the RMR Type 2 for quick target acquisition at close quarters.
The ACOG uses a red crosshair reticle with bullet drop compensation for .223, illuminated by fibre optics and tritium, so the reticle needs no battery. It uses Trijicon's Bindon Aiming Concept (BAC) for both-eyes-open shooting.
The set is supplied with a Trijicon Quick Release Mount and a set of backup iron sights, in a Flat Dark Earth (FDE) finish on a forged aluminium housing.
Key features
- Dual sighting system — Switch between the magnified ACOG and the RMR Type 2 red dot to suit the situation at hand.
- Battery-free ACOG reticle — The fibre optic and tritium illuminated reticle adjusts its brightness automatically to the available light.
- Both eyes open — The Bindon Aiming Concept (BAC) allows both-eyes-open shooting for improved situational awareness.
- BDC crosshair reticle — The bullet drop compensating and target-ranging reticle is calibrated for .223.
- External adjusters — No tools are needed for windage and elevation adjustments, as the ECOS features external windage and elevation adjusters.
- Fixed-power housing — The fixed-power design keeps moving parts to a minimum, and the dry nitrogen-filled housing mitigates fogging.
- Shock resistant — The optic is built to withstand recoil from a .22LR to a .50BMG and passes U.S. Military drop test requirements.
- Quick release mount — The included Trijicon Quick Release Mount allows the optic to be fitted and removed quickly.
Typical applications
- Service and duty rifles that need both close-quarters and longer-distance aiming capability.
- Close quarter battle situations where fast target acquisition with the red dot matters.
- Longer-distance shooting where precise, magnified aiming and bullet placement are required.
Technical specifications
| Length × width × height | 5.98 in x 2 in x 2.3 in (151.89mm x 50.8mm x 58.42mm) |
| Weight | 16.3 oz. (462.1g) |
| Magnification | 4x |
| Objective size | 32mm |
| Reticle pattern | Crosshair |
| Day reticle colour | Red |
| Night reticle colour | Red |
| Bullet drop compensation (BDC) | Yes |
| Calibre | 0.223 |
| Bindon Aiming Concept (BAC) | Yes |
| Illumination source | Fiber Optics & Tritium |
| Power source | Fiber Optics & Tritium |
| Eye relief | 1.5 in. (38.1mm) |
| Exit pupil | 0.32 in. (8.13mm) |
| Field of view (degrees) | 7° |
| Field of view (distance) | 36.8 ft. @ 100 yds. (12.27m @ 100m) |
| Mount | Quick Release |
| Housing material | Forged Aluminum |
| Finish | Flat Dark Earth (FDE) |
| Submersion depth | 66 ft. (20m) |
In the box
- 1 × ACOG® 4x32 BAC ECOS Riflescope with Trijicon RMR® -.223 BDC — Red Crosshair Reticle w/ Backup Iron Sights, FDE, Quick Release Mount & Automatic LED 3.25 MOA Red Dot RMR® Type 2, Flat Dark Earth
- 3.25 MOA RMR Type 2 LED Red Dot mounted to ACOG
- Trijicon Quick Release Mount (AC12033)
- Set of Backup Iron Sights
- LENSPEN (TA56)
- Lanyard Assembly for Adjuster Caps (TA71E)
- Trijicon Logo Sticker (PR15)
- ACOG Manual
- Warranty Card
Model information
| Brand | Trijicon |
| Model | ACOG® 4x32 BAC ECOS Riflescope with Trijicon RMR® -.223 BDC — Red Crosshair Reticle w/ Backup Iron Sights, FDE, Quick Release Mount & Automatic LED 3.25 MOA Red Dot RMR® Type 2, Flat Dark Earth |
| MPN | TA31-D-100553 |







