The Trijicon ACOG TA31RCO is a fixed-power 4×32 riflescope built to United States Marine Corps RCO specifications for the M4/M4A1 platform. It uses a red illuminated chevron reticle with dual illumination from fiber optics and self-luminous tritium, providing visible aiming points from bright daylight through total darkness without batteries. The design emphasizes compact, durable construction and supports two-eyes-open aiming for rapid target acquisition in varied lighting conditions.
Key Specifications
- Magnification is 4x.
- The objective lens diameter is 32mm.
- The reticle is an illuminated red chevron.
- Illumination source is fiber optics & tritium (battery-free).
- Weight is 15.8 oz.
- Eye relief is 1.5 in.
- Field of view is 36.8 ft @ 100 yds.
- Bullet drop compensation is Yes (BDC reticle).
- Mount supplied is a Flattop Thumbscrew Mount (TA51).
- Housing material is forged aluminum with a matte finish.
The TA31RCO pairs battery-free illumination, a proven BDC reticle and a rugged forged-aluminum housing to provide a durable, low-maintenance optic tailored for M4-pattern platforms and similar rifles. Its compact footprint and consistent 4x magnification make it suitable for users seeking a reliable, ready-to-use magnified sight across a wide range of daylight conditions.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.




