Long Branch serial number listing

[limpetmine]

I know that Long Branch had some experimental shortened rifles. Other than what is in TLES, I don't know.

Hi
Do you know anything about a shortened no4 mk1 Canadian style 303 , looks similar to a jungle carbine and has a serial number starting with AU**OL , has all military markings, just trying to confirm if these exsisted or someone has shortened it ?

thanks in advance