The Trijicon TA31RCO ACOG 4×32 is a fixed-power riflescope developed to the specifications of the United States Marine Corps for use on the M16A4 (20″ barrel). It employs dual illumination via fiber optics and self-luminous tritium to keep the aiming point visible in bright conditions and in total darkness without batteries. The reticle integrates a chevron-style aiming point with a bullet-drop compensator calibrated for .223/5.56 to support engagement across short and extended ranges.
Key Specifications
- Magnification is 4x.
- The objective lens is 32mm.
- The reticle is an illuminated red chevron with a target reference system.
- Illumination is provided by fiber optics & tritium, requiring no batteries.
- The optic includes a bullet drop compensator calibrated for .223 / 5.56 (20″ barrel).
- Eye relief is 1.5 inches.
- The exit pupil measures 8 mm.
- The field of view is 36.8 ft @ 100 yds (approximately 7°).
- Adjustment increment is .25 MOA @ 100 yds per click.
- Housing material is forged aluminum and the optic is waterproof, fogproof, and shockproof.
The TA31RCO-A4 is supplied with mounting options and accessories appropriate to its USMC configuration, including a thumbscrew flattop adapter, killFLASH anti-reflection device, Scopecoat, LENSPEN, adjuster cap lanyards, manual, and warranty card. Its dual-illumination reticle and BDC design make it suitable for operators who need a rugged, reliable optic that performs across varied light conditions and engagement distances.
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.
