A Brief History on the No. 5 Mk 1 "Jungle Carbine":The Rifle No. 5 Mk I, was a derivative of the British Lee–Enfield No. 4 Mk I, designed in response to a requirement for a shorter, lighter rifle for airborne forces in Europe. However its operational use was in post-war jungle campaigns such as the Malayan emergency, where it gained its common nickname of the "Jungle Carbine."
Production began in March 1944, and finished in December 1947.