Maschinengewehr is German for "machine gun" (literally, "machine rifle"). The standard naming system for German machine guns was a prefix of "Maschinengewehr" (abbreviated as MG) and a two-number suffix giving the year in which the gun was designed.
Examples
Maschinengewehr 99 Maschinengewehr 01 Maschinengewehr 08 Maschinengewehr 13 Maschinengewehr 15 Maschinengewehr 30 Maschinengewehr 34 Maschinengewehr 42 Maschinengewehr 45 Maschinengewehr 60 Maschinengewehr 3 Maschinengewehr 50 Maschinengewehr 51 Maschinengewehr 710-3