Inglis Bren MkIIM

[Brit plumber]

I'm still pretty confident the gun started life as a 7.92mm gun, It's just my opinion but the body is likely to be an unfinished/un assembled Mk2 body assembled into a 7.92mm gun post war as part of that sterile Bren contract for the CIA??? (And subsequently rejected maybe due to markings) The serial number is certainly in that format. That may explain the replacement magazine well insert too.

I have on record several serial numbers of Inglis mk2 Brens assembled after the last serial number recorded by Inglis. When was the last Mk2 supposedly assembled? I don't have my books to hand.