Trijicon ACOG 4x32 Dual Illuminated Rifle Scope Red M855 RCO Reticle

The Trijicon ACOG TA31RCO-M855 is a 4x32 Advanced Combat Optical Gunsight designed for use with the USMC M16A4 (20" barrel) and M16/M4 (14.5" barrel) weapon systems. It features dual illumination technology combining fiber optics for daylight brightness auto-adjustment and self-luminous tritium for use in total darkness — no batteries required. The red M855 bullet drop compensating reticle is purpose-built for use with the standard 5.56 NATO M855 cartridge.