Trijicon ACOG TA31RCO BAC Rifle Scope 4x 32mm A4 Military Version Dual-Illuminated Red Chevron 223 RemingtonReticle with TA51 Flattop Mount Matte Black

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