An attack helicopter is a military helicopter specifically designed and built to carry weapons for attacking targets on the ground, such as enemy infantry, armored vehicles and structures. Weapons used on attack helicopters can include autocannons, machine-guns, rockets, and guided missiles such as the Hellfire. Many attack helicopters are also capable of carrying air to air missiles, though mostly for purposes of self-defense.
This will show you the world's most advanced attack helicopters. Including its development, design, operational history, variants, specifications and many photos.

attack helicopters:
AH-1 Cobra
AH-64 Apache
Agusta A129 Mangusta
Denel AH-2 Rooivalk
Eurocopter Tiger
Kawasaki OH-1
Kamov Ka-50 & Ka-52
Min-24 Hind
Min-28 Havoc