The Imperial German Flying Corps (Luftstreitkräfte) decided to adopt the rifle, where operating conditions lessened the chances of the action being fouled by mud, and issued two rifles to each aircraft's crew. The M1903 proved to be a significant improvement over the bolt-action Gewehr 98 rifles and Parabellum-Pistole pistols usually issued to crews. The M1908 rifle was re-designated as the Fl.-S.-K. 15 ("Flieger-Selbstladekarabiner, Modell 1915" - Aviator's Selfloading Carbine, Model 1915) and was issued with 30-round drum magazines. The drum magazine issued with the Fl.-S.-K. 15 was that designed and patented by Friedrich Blum, with a later 32-round version of the drum magazine ("Trommelmagazin 08") that had been designed for the 1913 Parabellum-Pistole (LP 08). The corps used the Mondragón rifle until a sufficient number of machine guns equipped with a synchronization gear became available, after which the M1908 was phased out of service and given to the navy. Very few of the Mondragón rifles survived the war, although almost all of the rifles were still in use by the Imperial German Navy when the First World War ended. The usage of the Mondragón in the German Imperial Navy would involve destroyer crews and Seabattlions Pioneers being entirely issued Mondragón and pistol carbines In Switzerland, the Mondragón self-loading rifle was modified to use the 7.5×55mm Swiss cartridge, came equipped with a 12-round magazine and a "Hülsenfangkorb" (a device to collect the ejected cartridges).