Hi Tim, I know nothing about guns but googling World War 1 guns brings up sites providing lists of guns for the all the countries involved including the British Empire. Might help. Judy > This is a general inquiry. I have come into possession of an old postcard > from my great uncle Darcy Smith when he was in WWI and am having trouble > with one small detail. He says "I opened fire today at 400 yards with the > M.?. and done good work". Does anyone have an idea what the ? is and what > a > M.?. might be. I assume it is some kind of gun. >