?
Most everybody who has served in the Bundeswehr, (MG3) Many from NATO who have served with them (on REFORGER exercises and such) , many members of the Spanish military, (MG 42/59, MG 82) Various guerilla forces throughout the world supplied MG 34s and 42s by the Soviet union, which had stockplies of them acquired in WWII, etc. So I think it might be more people than you think. Sure some were in different calibers, (7.62 and 5.56 NATO) but they are MG34/42 designs.