Not a Giffard, suspiciously like a Greener though

[Hsing-ee]

The experience of the Volkssturm suggests that untrained personnel with rubbish weapons are at most a minor irritant to a professional army. Their most effective weapon was not even a gun - the Panzerfaust.

If you need to arm folks quickly with a vaguely useful weapon, in the absence of an established mass-production arms industry, you want something like a Sten. Witness the various SMGs turned out during the Yugoslav civil wars of the 1990s.

AKs would be better.

Yes but that presumes the militia do not turn on the Authorities once hostilities cease ...