This is a machine gun, It has many qualities, It is so heavy, every person can not be used and can not be shoot,
A machine gun is a fully automatic mounted or portable firearm, usually designed to fire bullets in quick succession from an ammunition belt or large-capacity magazine, typically at a rate of several hundred rounds per minute. The first design/invention of the machine gun was by Leonardo Da Vinci, presenting a design of an eight barreled machine gun that was operated manually by a bandcrank, and was mounted onto the ground, and barely portable.
