This recently finished on eBay....and is very relavent to this thread. Different in that the rifle is integeral to the blade (representing a rifle with fixed bayonet ?) and is not a blade 'hidden' within a 'rifle' scabbard.
Stated as 29" long and from Zimbabwe
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=011