High Quality Content by WIKIPEDIA articles! The Parabellum MG14 was a 7.9 mm caliber World War I machine gun built by Deutsche Waffen und Munitionsfabriken. It was an adaptation of their Maschinengewehr 08 gun intended for use on aircraft and zeppelins. The MG08`s belt-style ammunition feed was enclosed in a drum, the recoil casing was lightened, and the cooling jacket was modified for air- instead of water-cooling. The rate of fire was 700 rounds/minute.