Trijicon TA01NSN ACOG 4x32mm M4A1 223Cal Amb Crosshair 36.8ft @ 100yds FOV Black

The ACOGs are internally adjustable, compact telescopic sights with tritium illuminated reticle patterns for use in low light or at night. Bindon Aiming Concept (BAC) models feature bright daytime reticles using fiber optics which collect ambient light. The ACOG combines traditional, precise distance marksmanship with close in aiming speed. Although the ACOG has many features which are very advantageous for military use, they were developed by Trijicon without government funding. Designed for use with the M16 family, every feature of its mechanical and optical design was chosen for a single purpose: to provide increased hit potential in all lighting conditions -- without failure prone batteries.