ACOG 2x20  with M16 Base, Amber Triangle Reticle and BAC. 

This is the most compact unit. It is a step up in magnification and 
is well suited to limited space on a weapon like the UZI, H & K, or 
MP-5 9mm sub-machine guns. It further increases the ability to detect 
and identify targets out to 150-200 meters.