"I saw a Jungle carbine Enfield #4"
The Jungle Carbines are No. 5s.
You have to be careful, though, as reproduction Jungle Carbines were made from No. 1 Mk IIIs.
All the one's I've seen so made have been marked No. 1 Mk III on the stock socket where it's covered by the bolt handle when the handle is closed.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.