Victor Goryunov was a very clever man who created a special kind of gun called a machine gun. A machine gun is different from a regular gun because it can shoot many bullets very quickly, like a water hose spraying out lots of water at once.
Mr. Goryunov's machine gun was special because it could shoot even more bullets than other machine guns. It was also designed to be very reliable, which means it would work well even in tough conditions, like in a war.
Lots of people wanted to use Mr. Goryunov's machine gun, and it became very important for the Russian army. It helped them win many battles and keep their country safe.
So, to sum it up, Victor Goryunov was a smart guy who invented a really good gun that helped the Russian army protect their country.