It is as it should be.

The topic came up about the "Jungle Carbine" on another thread. Last week as I was in a fabricating mode, I decided to convert my No5 back to its original configuration but I cannot do that because the original No5 barrel was toast and I added that rear sight with the windage adjustment. I do however have a Fazackerly No4 barrel that has been cutdown and had an aftermarket flash hider installed. 

Nice!