The ACOG model I tested is the TA01, 4x32, with red crosshair, full illumination.
The reticule is black during daytime.
It also incorporates a bullet drop compensator to engage targets farther than the zero, without having to adjust the elevation.
At night, tritium illuminates the reticle.
On this model, the following can be seen: ACOG4X32JN8:12. Yes, JN8:12 is a biblical reference.
When Jesus spoke again to the people, he said, "I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life."