"Jungle Carbine" - Origin

[villiers]

I did a search for the defintion and this what goggle found

Bolts are defined as headed fasteners having external threads that meet an exacting, uniform bolt thread specification (such as M, MJ, UN, UNR, and UNJ) such that they can accept a nontapered nut. Screws are defined as headed, externally-threaded fasteners that do not meet the above definition of bolts.

So it should be a "king bolt" ... or not?

[milprileb]

Well, I am 63 and as a kid, age 10-11 in 1958, I can tell you I drooled over the "Jungle Carbine" ads in Outdoor Life,
Field & Stream magazines. I can still visualize the add showing a guy with a Aussie hat and the cool looking carbine
with the flash hider.

Not that this made any impression on a 10 yr old or nothing but I do have 4 of them and a certain emotion about them.

I have seen one in Iraq and I saw one in the military museum in Peking.

Anyhow, if one can document earlier than 1958, they got me ~