The 'AK-47' is the ubiquitous label for the most recognisable group of firearms on the planet, but would you be correct in calling all AK-type rifles AK-47s? Is there indeed any such thing as an 'AK-47'? Join Jonathan Ferguson as he examines the lineage of the most produced firearm family of all time to see what, if indeed anything can truly call itself an AK-47.