EBAY LUGER STOCK-GALE MORGAN'S COMMENT

If true that the stock was designed for aircraft use, then WWI is a more likely time period. There was about a year of combat before Anthony Fokker designed machine gun synchronising gear for the Fokker E.1 Eindekker (first successfully used 1 Aug 15) when the Germans were scrambling to find something to shoot from aircraft. Mauser Broomhandles were tried and the Mondragon rifles (FSK15 Flieger Selbstlade Karabiner Modell 1915) were tried. Maybe someone tooled up to make a Luger aircraft stock, the need for which disappeared almost overnight. Perhaps very few were actually manufactured.