DH 82 Tiger Moth ...

[jcf]

Just to confuse matters, the Genet Major I had five cylinders like the Genet.  The Genet Major IA was the one with seven cylinders and to confuse things further, was also known as the Civet I.

Civet I was the military designation.   

[Mossie]

Found a little bit more on the Tiger Moth Fighter in the Flight archive, with an pic showing the view from the cockpit.  Machine gun is described as a 7.92mm.

http://www.flightglobal.com/pdfarchive/view/1933/1933%20-%200815.html
http://www.flightglobal.com/pdfarchive/view/1933/1933%20-%200816.html

[PR19_Kit]

Hah! 

I LOVE the method of testing to see if the bullets hit the prop! Bolt a large disc on behind the prop and see where the holes end up!