Trijicon ACOG 4x32 RCO Red Chevron M4 Rifle Scope TA31RCO
Trijicon
$1,427.69
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Trijicon
Trijicon ACOG 4x32 RCO Red Chevron M4 Rifle Scope TA31RCO
The Trijicon ACOG RCO 4x32 Red Chevron M4 is the battle-proven riflescope trusted by the United States Marine Corps, delivering exceptional optical clarity and dual-illuminated targeting precision across every lighting condition imaginable.
- 4x32mm fixed magnification optimized for both CQB and extended-range engagements
- Red chevron reticle with bullet drop compensation calibrated for M4/M16 ballistics
- Dual-illuminated reticle powered by fiber optics and tritium — no batteries required
- Aircraft-grade aluminum alloy housing built to withstand combat-level abuse and recoil
- Both-eyes-open design enables superior situational awareness in dynamic environments
- Forged, hard-anodized body with fully multi-coated lenses for maximum light transmission
Who This Is For
The Trijicon ACOG RCO 4x32 is the go-to optic for serious AR-15 and M4-platform shooters — from military veterans and law enforcement officers who want a field-proven sight to competitive 3-gun shooters and dedicated home defenders who refuse to compromise on reliability or optical performance. If you're looking for a no-batteries-needed, always-ready optic that excels from room-clearing distances out to 500+ yards, this is it.
Specifications
| Magnification | 4x |
|---|---|
| Objective Lens Diameter | 32mm |
| Reticle | Red Chevron (BDC for M4/M16) |
| Illumination | Fiber Optic & Tritium (battery-free) |
| Eye Relief | 1.5 inches |
| Field of View | 36.8 feet @ 100 yards |
| Click Value | 0.5 MOA |
| Length | 5.8 inches |
| Weight | 9.9 oz (with mount) |
| Housing Material | Forged 7075-T6 Aluminum Alloy |
| Finish | Hard Anodized Matte |
| Mount | TA51 Flattop Adapter Included |
| Warranty | Limited Lifetime |
Frequently Asked Questions
What firearms is the Trijicon ACOG RCO 4x32 compatible with?
The ACOG RCO 4x32 is specifically designed and ballistically calibrated for M4 and M16 platform rifles chambered in 5.56mm NATO / .223 Remington. The included TA51 flattop adapter mounts directly to any MIL-STD-1913 Picatinny rail, making it compatible with a wide range of AR-15 and M4-style rifles. The BDC chevron reticle is optimized for M855 62-grain ammunition trajectories, so shooters using standard 5.56 or .223 loads will find the holdover points highly accurate out to 800 meters.
Does the ACOG RCO require batteries to illuminate the reticle?
No — one of the ACOG's most praised features is its completely battery-free illumination system. The red chevron reticle is powered by a combination of a fiber optic light collector (for bright daytime conditions) and a tritium phosphor lamp (for low-light and nighttime use). This means the reticle is always illuminated and ready to use without any switches, battery compartments, or charging required. Tritium illumination typically lasts 10–15 years before it begins to dim.
How does the red chevron reticle work for bullet drop compensation?
The red chevron reticle in this ACOG is engineered as a bullet drop compensator (BDC) for the M4 carbine firing M855 5.56mm ammunition. The tip of the chevron represents your 100-meter zero, and successive stadia lines and holdover points below it correspond to 200, 300, 400, 500, 600, 700, and 800-meter distances. This allows for rapid, accurate elevation holds at extended ranges without manually adjusting your turrets — simply place the appropriate point on your target and fire.
