Viking SMG

[James Langham2]

Recently I managed to get into the Defence ACademy, Shrivenham's collections (through a friend who writes for Osprey) and I managed to get my hands on a few unusual weapons. The Viking SMG features in the RDF Sourcebook but IRL probably less than a thousand were made. It seems a perfectly fine SMG but given that there were so many alternatives that did the same job just as well it never took off.

Anyone incorporate it into their world?