Trijicon ACOG ECOS 4x32 Rifle Scope Crosshair .223 Green Reticle with RMR Red Dot Sight Flat Dark Earth – TA31-D-100554

The Trijicon ACOG ECOS 4x32 Rifle Scope Crosshair .223 Green Reticle with RMR Red Dot Sight Flat Dark Earth (SKU TA31-D-100554) is the ECOS package: a fixed 4x32 ACOG with a green dual-illuminated .223/5.56 crosshair BDC reticle, a 3.25 MOA RMR Type 2 red dot sight mounted on top, backup iron sights and a Trijicon quick-release mount, finished in Flat Dark Earth.

How It Compares

ECOS stands for Enhanced Combat Optical Sight — the ACOG as the magnified primary and the RMR as the close-range secondary, so you roll the rifle rather than change optics. Against a plain 4x32 ACOG you gain the RMR, the backup irons and the quick-release mount; against a red dot alone you gain 4x magnification and a battery-free primary reticle. This is the green-illumination version in Flat Dark Earth; the red-crosshair equivalent is the Trijicon ACOG ECOS 4x32 rifle scope, red crosshair with RMR. See the whole range in Trijicon ACOG rifle scopes, all rifle scopes, AR-15 optics or the full Trijicon optics range.

Ideal For

• Duty, defence and hard-use carbines that need one magnified and one close-range sight
• Shooters who want a primary reticle with no battery to check
• Builds where backup irons and a quick-release mount are part of the requirement

Key Features

• Reticle: Green crosshair BDC, dual-illuminated, calibrated for .223/5.56 flattop rifles out to 600 metres
• Illumination: Dual illumination: fibre optics (day) + tritium (night), battery-free
• Secondary Sight: Trijicon RMR Type 2 with a 3.25 MOA LED red dot, mounted on top
• Mount: Trijicon Quick Release Mount AC12033 (included)
• Finish: Flat Dark Earth
• Warranty: Trijicon Limited Lifetime Warranty

Technical Specifications

Warranty

Trijicon back this with their Limited Lifetime Warranty: the optical system and metal structure are covered against defects in materials and workmanship for the lifetime of the original owner. The tritium lamp carries its own multi-year term from date of manufacture.

UK Delivery & Support

Delivery is a flat £5 by Royal Mail Tracked 24, UK addresses only, with no free-delivery threshold. Allow 7–10 business days from order to doorstep — most of that window is sourcing, and the Tracked 24 leg is the last day of it. Duties and import fees are prepaid, so there is nothing to pay on arrival. Questions about reticles, mounts or fit? Email info@xtremetactical.co.uk, or message us on WhatsApp or by text on +44 7940 435857 — messages only, we don't answer voice calls.

Frequently Asked Questions

Does it need batteries?
The ACOG reticle does not — it is lit by fibre optics in daylight and tritium in the dark. The RMR Type 2 mounted on top is an LED sight and does take a battery.

What calibre is the reticle calibrated for?
.223 / 5.56 — the bullet drop compensating stadia are calibrated for .223/5.56 flattop rifles out to 600 metres.

Does it come with a mount?
Yes — the Trijicon Quick Release Mount AC12033 is included, rather than the TA51 thumbscrew adapter.

Can I shoot with both eyes open?
Yes — the ACOG is designed around the Bindon Aiming Concept for both-eyes-open shooting at speed.

What warranty does it carry?
Trijicon's Limited Lifetime Warranty. The tritium lamp carries its own multi-year term from date of manufacture, and Trijicon's warranty excludes Cerakote surface damage.

Is this a genuine Trijicon product?
Yes — factory-new, genuine Trijicon, covered by Trijicon's Limited Lifetime Warranty.