What is the real name of ak 47?

AK-47 was the acronym/nickname for the Soviet-made 7.62mm Assault Rifle that was developed from 1944-1947 and used worldwide since its first production date in 1949.

It's official name is the Avtomat Kalashnikova, 1947 edition. The name broken down is: Avtomat means automatic in Russian, Kalashnikova is the last name of the inventor of the AK series, and 47 represents the year the design of the gun was finished, 1947.