In the Second World War the number of automatic rifles were always low in New Zealand and Australia due to a small number of precision firearms factories in the region. (One really, at Lithgow in Oz.) So a machinist in Hastings came up with a conversion for the ubiquitous Lee Enfields. Changing a very reliable bolt action rifle into a selective fire one! Basicially a gas port is added halfway along the barrel and and action rod is attached to the bolt, so every time you fire, it cycles the action, reloading and cocking it.
Meet the Charlton Automatic Rifle , this example is a locally made reproduction, nearly every one of the original lot of 1,500 were destroyed in a postwar fire!