German Maschinengewehr

List of German ww2 MG's

MG 08, dated from world war 1 fired 7.92 x 57 mm round.
MG 15, installed for self defence in aircraft like Stuka and HE 11.
MG 30, refused by the army
MG 30(t), chzeck machinegun built by the Germans, mainly used by the SS.
MG 34, see link.
MG 42 see link.
MG 45, crisis gun, cheap last effort. copied from MG42.
MG 81, Gun used by aircraft.

http://www.warandtactics.com/smf/world-war-ii-axis-equipment/mg-42/