Adapted from the battlefields, US Forces have begun improving this
proven Trijicon ACOG scope by adding a small Red Dot sight on top
for close encounter missions. Trijicon has now created a similar
model for the public, the TA31TRD. The main Trijicon scope provides
a dual-illuminated reticle using fiber optics and tritium for bright
aiming point in any light condition. The ranging reticle allows for
bullet drop compensation out to 600 meters without any manual
adjustments. A Trijicon RedDot™ sits on top with a 8.0 MOA aiming
dot.