The M16 is undoubtedly one of the most recognisable weapons in the history of firearms. But, did you know that the Colt Model 715 M16A2 was also adopted into limited use by British armed forces. Join Jonathan Ferguson as he explores the key differences between a British service M16 and its American counterpart and looks at whether history could have looked a little different, should this iconic American firearm have seen wider adoption in place of the SA80.