There are no "fighter helicopters" - helicopters have engaged in
combat against each other, but there are none designed with
air-to-air combat as their intended function. The current inventory
includes 20 Mil Mi-25 attack/cargo helicopters (which are about to
be replaced with AH-64 Apaches), 7 HAL Rudra attack helicopters
(out of 38 ordered), 3 HAL Light Combat Helicopters (out of 65
ordered), over 300 variations of the Mil Mi-8 cargo helicopter
(which can be armed and used as gunships).. nothing specifically
designed as a "fighter" helicopter, though.