The Trijicon ACOG RCO M150CP 4x32 Rifle Scope Chevron Dual-Illuminated Red Reticle (SKU TA31RCO-M150CP) is the US Army Rifle Combat Optic: a fixed 4x, 32 mm ACOG with a red chevron bullet drop compensating reticle cut for the M4 weapon system with a 14.5 in barrel, lit by fibre optics in daylight and a tritium lamp after dark with no battery of any kind.
How It Compares
The RCO models are the issued configurations rather than the commercial ones: the reticle is calibrated to a specific barrel length and the box carries the service accessories, including the TA91 killFlash anti-reflection device. This is the US Army M150 with the chevron; the RCO M4CP is the USMC optic for the M4 and M4A1, also cut for 14.5 in, and the RCO A4CP is the M16A4 version cut for a 20 in barrel. The same M150 reticle with a green lamp is the RCO M150CP Chevron Green, and the commercial equivalent is the ACOG 4x32 Chevron .223 BAC. Browse all rifle scopes, the Trijicon ACOG rifle scopes range or the full Trijicon optics range.
Ideal For
- M4-pattern carbines with a 14.5 in barrel, where the reticle holds are cut to that barrel
- Shooters who want the issued US Army specification rather than the commercial equivalent
- Duty use where the killFlash and flip caps matter as much as the glass
Key Features
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Reticle: Red Chevron BDC, US Army Rifle Combat Optic M150, designed for the M4 weapon system with a 14.5 in barrel
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Illumination: Dual illuminated: fibre optics (day) + tritium (night); battery-free
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Calibre Calibration: .223 / 5.56, calibrated for a 14.5 in barrel
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Mount: Flattop Thumbscrew Mount TA51 (included)
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Warranty: Trijicon Limited Lifetime Warranty
Technical Specifications
| Magnification / Objective |
4x fixed |
| Objective |
32 mm |
| Reticle |
Red Chevron BDC, US Army Rifle Combat Optic M150, designed for the M4 weapon system with a 14.5 in barrel |
| Reticle Colour |
Red |
| Calibre Calibration |
.223 / 5.56, calibrated for a 14.5 in barrel |
| Illumination |
Dual illuminated: fibre optics (day) + tritium (night); battery-free |
| Eye Relief |
1.5 in (38 mm) |
| Exit Pupil |
0.32 in (8.1 mm) |
| Field of View |
36.8 ft at 100 yards (12.3 m at 100 m); 7° |
| Weight |
14.9 oz (422 g) with the TA51 mount |
| Housing |
Forged aluminium (7075-T6), matte black |
| Mount |
Flattop Thumbscrew Mount TA51 (included) |
| Water Resistance |
Submersion depth 66 ft (20 m); dry-nitrogen filled, fogproof |
| What's Included |
RCO, TA51 thumbscrew flattop adapter, TA91 killFlash anti-reflection device, objective and eyepiece flip cap set, TA56 LensPen, TA71E lanyard assembly, PR15 logo sticker |
| SKU / MPN / UPC |
TA31RCO-M150CP / TA31RCO-M150CP / 719307302242 |
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?
No — the reticle is lit by fibre optics in daylight and tritium in the dark. There is nothing to switch on and nothing to run flat.
What calibre is the reticle calibrated for?
.223 Remington and 5.56 NATO, with the holds cut for a 14.5 in barrel. A longer or shorter barrel will shift them.
What does M150 mean?
M150 is the US Army designation for this Rifle Combat Optic. It identifies the issued configuration and the reticle calibrated to the M4 weapon system.
Does it come with a mount?
Yes — the TA51 Flattop Thumbscrew Mount is included, along with the TA91 killFlash anti-reflection device and a flip cap set.
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.
Is this a genuine Trijicon product?
Yes — factory-new, genuine Trijicon, covered by Trijicon's Limited Lifetime Warranty.
