I was thinking about this the other day as I played Gears of War 2. The best weapon for close range combat is (apart from the chainsaw bayonet) a shotgun. So how come when in a jungle environment we use rifles with iron sights still? Surely a shotgun would be better in this environment. If the taliban jump out of the trees and are just 2 meters in front of you it would be much easier to take them out with a shotgun blast than a it would an SA80. Also due to the spread, it could be possible to kill or maim two enemy soldiers standing very close together with just one shell.