Interesting bit of an ACM replica available for US$80.00 at Gunner Airsoft. This is a replica of the ISM-V, the world's first Integrated Sighting Module made by L-3 Insight Technology. This is a combination of a red dot and visible aiming laser which are co-aligned (or co-witnessed) as the operator dials in windage and elevation, and putting both red dot and laser on the target at the same time, giving you dual-confirmation on target acquisition.