Si te fijas en las fotos con más atención o buscas fotos del Mi-35M vas a ver que en la nariz tiene un cañón bitubo de 23 mm, no un rotativo de 12,7 mm como ya aclare mas arriba. Si quedan dudas, sito a globalsecurity (
http://www.globalsecurity.org/military/world/russia/mi-24-variants.htm):
Mi-24VM - upgraded Mi-24V with updated avionics to improve night-time operation, new communications gear, shorter and lighter wings,
and updated weapon systems to include support for the Ataka, Shturm and Igla-V missiles and a 23 mm main gun. A full-size mock-up Mi-24VM (Mi-35M for export) had frequently been presented at air shows since 1994. It was, however, only in February 1999 that flight tests of the Mi-24VM prototype began at the Mil Design Bureau airfield at Panki on the outskirts of Moscow. During nearly thirty years of incremental development of the Mi-24 it had grown heavier and heavier, and its flying qualities and performance worsened progressively. The modernized Mi-24VM is nearly 1,300lb (600kg) lighter than Mi-24V with an empty weight of 17,720lb [8,040kg], compared with the latter's 18,998lb [8,620kg]). It has shortened stub wings, a fixed undercarriage and the main and tail rotors have been replaced with lighter units 'borrowed' from the Mi-28N helicopter. The new main rotor increases the thrust by some 660lb (3kN). The Mi-24VM was expected to operate until 2015, but development was halted in favor of th less ambitious and less expensive Mi-24PN.
Mi-35M - Upgraded helicopter created on the basis of the serial Mi-35 helicopter in order to provide round-the-clock accomplishment of combat missions, to enhance firepower and improve its tactical-technical characteristics. Much more up-to-date Mi-35M model was adopted in the Armed Forces in 2006. The helicopter is fitted with a 9K113K round-the-clock guided weapons complex, which includes an OPS-24N observation-sight system, and an up-to-date airborne radio electronic equipment complex. Rostvertol officials say the Mi-35M's new rotor system, which is taken from the prototypes of the next generation Mi-28 assault helicopter (also is built at the Rostov-based company), increases the flight altitude up to 5,000 meters. Similar to Mi-24PN, the upgraded Mi-35 has new engines and enhanced armor. Although Mil designers have initially equipped the aircraft with the Russian navigation and fire control systems, foreign avionics can also be installed upon customer request. [Previously, the Mi-35M designation was applied to an export counterpart of Mi-24M / Mi-24VM / Mi-24PM `Hind-E' - Upgraded night-capable version of Mi-24/35 designed to meet the latest air mobility requirements of the Russian Army. Modernization of Mi-24(35) type helicopters,
the Mi-35M is an upgraded Mi-24 featuring the Mi-28's rotors and transmission, a twin barrel 23mm cannon and 91K114-9 Ataka advanced anti armor missiles, Sextant Avionique of France avionics and displays and Thomson-TTD Chlio FLIR ball].
Si no quedo claro me remito a estas fotos donde se ve cañon de nariz de 23 mm en Mi-35M