notice the "R" immediately after the "F". Infra means "red" in Latin so...yeah.
Anyway, I never even noticed an infrared sight on the HVS .45 in any of the vids. Are you sure you're not confusing it with the Red Dot sight? --- Uncharted 2 Machinima Voice Actor. Currently playing Sully and Lazarevic. Add me on PSN if you want to get involved: Geo_Chronic.