AK-47 is a gun.
AK-47 . It is the originating firearm of the Kalashnikov rifle ( or `` AK '' ) family . As of 2004 , `` Of the estimated 500 million firearms worldwide , approximately 100 million belong to the Kalashnikov family , three-quarters of which are AK-47s '' . A stock , also known as a shoulder stock , a buttstock , or simply a butt is a part of a rifle or other firearm , to which the barrel and firing mechanism are attached , that is held against one 's shoulder when firing the gun .