The right to bear arms is not a British invention.
1982 Senate Report ('Other Views' explicitly invited by the Subcommittee); Historical Bases of the Right To Keep and Bear Arms, by David T. Hardy
guncite.com
It is fairly clear that its origin lay in the customs of Germanic tribes, under which arms bearing was a right and a duty of free men; in fact, the ceremony for giving freedom to a slave required that the former slave be presented with the armament of a free man.
[4] He then acquired the duty to serve in an equivalent of a citizen army