Mil Mi-24 Hind Assault and Attack Helicopter,Russia

The Mil Mi-24 (Russian: Миль Ми-24; NATO reporting name: Hind) is a large helicopter gunship, attack helicopter and low-capacity troop transport with room for eight passengers. It is produced by Mil Moscow Helicopter Plant and has been operated since 1972 by the Soviet Air Force and its successors, along with more than 30 other nations.
Soviet pilots called the Mi-24 the "flying tank" (летающий танк; letayushchiy tank), a term used historically with the famous World War II Soviet Il-2 Shturmovik armored ground attack aircraft.

Ka-50 Black Shark (Hokum) Attack Helicopter, Russia

The Ka-50 Black Shark helicopter (Russian: Чёрная акула; Chornaya Akula, NATO reporting name: Hokum A) is a single-seat attack helicopter for destroying armored vehicles, slow-speed air targets and manpower on the battlefield.Coaxial Ka-50 helicopter has two three-blade rotors of 14.5-m diameter each. The polymeric composite blade is attached to the hub by a torsion bar. The airframe features perfect aerodynamic outlines, mid-set stub wing, retractable three-leg landing gear and empennage of a fixed-wing aircraft type. The pilot cockpit is fully armored.

Mil Mi-28 Havoc Combat Helicopter, Russia

The Mil Mi-28 (NATO reporting name "Havoc") is a Russian all-weather, day-night, military tandem, two-seat anti-armor attack helicopter. It is a dedicated attack helicopter with no intended secondary transport capability, better optimized than the Mil Mi-24 gunship for the role. It carries a single gun in an undernose barbette, plus external loads carried on pylons beneath stub wings.
First flown in November 1982, and designed to fulfil the same role as the American AH-64 Apache which it generally resembles, the agile Mi-28 'Havoc' military helicopter was scheduled to enter full service with the CIS forces in 1992, but lost out to the Kamov Ka-50. The three prototypes had a conventional three-bladed tail rotor but this has since been replaced by a 'delta 3' x-configured rotor comprising two independent two-bladed propellers mounted on the same shaft.