Jeremy Clarkson takes a look back at the past, present, and future of guns in this latest BBC documentary. Video (7-parts) after the jump.

The projectile, its caliber, or diameter, usually designated in fractions of an inch or in millimeters, is fired through a hollow tube known as the gun’s barrel. Differing from the musket, the modern gun is rifled,excluding smoothbores on tanks and artillery, with a series of grooves spiraling along the barrel, and indeed the first rifles were known as ‘rifled guns’

Part 1

Part 2

Part 3

Part 4

Part 5

Part 6

Part 7