This is the Russian PKM (Pulemet Kalashnikova) general purpose light machine gun. It fires the 7.62x54r cartridge and is reported to be one of the most realiable and deadlest in it's class of auto weapons. This weapon is extremely veritile and is encountured in the Soviet satalite states as well as Iran and Iraq. Rate of fire on this model is about 750rpm. The excess smoke is produced by the military surplus ammo that was used.