Infra-sight

Weapons with Rapid Fire cannot be fitted with infra-sight. A weapon with an infra-sight can be used to attack through smoke clouds (Pg. 39 Underhive), and is unaffected by low-light conditions. In addition, there is no hit modified when the weapon targets a fighter in partial cover, and a -1 modifier (instead of -2) when it targets a fighter in full cover.