The TA31RCO is an Advanced Combat Optical Gunsight (ACOG) designed for the USMC's M16A4 weapon system (20 barrel). It incorporates dual illumination technology using a combination of fiber optics and self-luminous tritium.
This allows the aiming point to always be illuminated without the use of batteries. The tritium illuminates the aiming point in total darkness, and the fiber optic self-adjusts reticle brightness during daylight according to ambient light conditions.This allows the operator to keep both eyes open while engaging targets and maintaining maximum situational awareness. Designed to the exact specifications of the United States Marine Corps, the unique reticle pattern provides quick target acquisition at close combat ranges while providing enhanced target identification and hit probability out to 800 meters utilizing the Bullet Drop Compensator. No tools are needed for windage and elevation adjustments because the TA31RCO features external adjusters, making it waterproof up to 11m without the caps. Mounting bosses are integrated into the housing by the eyepiece to allow the easy addition of a Trijicon RMR (not included). Most ACOG® models are battery free, featuring a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light.
"Both eyes open" shooting using Trijicon's Bindon Aiming ConceptT (BAC) feature allows for improved situational awareness. No other magnified optic has been used more in combat than the ACOG. Several ACOG models are designed with a user adjustable brightness setting powered by a single AA battery.The 3.5x35 LED and 4x32 LED models both offer six adjustable brightness settings. The quality of the glass and multi-coated lenses maximize light-gathering capabilities and clear field of view with zero distortion.
Fixed-power design allows for minimal moving parts to create a nearly indestructible sighting system. EXACT TARGET DISTANCES & HOLDS.Most ACOG models feature a bullet drop compensating and target-ranging reticle for decisive aiming. Exceptional waterproof performance that exceeds military standards. Dry nitrogen-filled to eliminate fogging. This optic is tested to withstand and perform in extreme cold and heat with dry-nitrogen filled housing that mitigates fogging.