Trijicon 100230 ACOG 4x32mm Illuminated Red Chevron Riflescope - Black Hardcoat Anodized

The Trijicon 100230 ACOG is the USMC Rifle Combat Optic (RCO), a battle-proven 4x32mm fixed-power riflescope built to United States Marine Corps specifications for the M4 and M4A1 weapon system with a 14.5" barrel. Designated TA31RCO-M4CP, this Advanced Combat Optical Gunsight is purpose-built for fast, intuitive close-quarters target acquisition.

At the heart of the optic is the signature illuminated red chevron reticle, which uses Trijicon's dual illumination technology: tritium for low-light and no-battery operation, paired with a fiber-optic collector that automatically adjusts brightness in changing light. The chevron reticle provides bullet drop compensation calibrated for the 14.5" M4 barrel profile, giving rapid holdovers without manual adjustment.

Optical performance is anchored by 4x magnification and a 32mm objective, producing a generous 36.8 ft field of view at 100 yds and a comfortable 1.5" eye relief. Multi-coated lenses maximize light transmission and contrast, and 2 clicks per inch at 100 yds gives precise, repeatable zeroing. The scope is fogproof, shockproof, and waterproof, built around a rugged forged aluminum housing finished in black hardcoat anodize.

The TA31RCO ships with the TA51 mount for fast, rock-solid attachment to the M4/M4A1 flattop receiver. At just 5.80" long and 15.8 oz, this ACOG adds minimal bulk to the rifle while delivering the rugged, battery-free performance Trijicon ACOGs are known for across US military, law enforcement, and civilian users.

Condition: New.