[Throwawayaerlei]

And as a result our first post-WWII new and first General Purpose Machine Gun (GPMG, TL;DR: barrels are in field quick change consumables) was the awful M60.

Now replaced by a couple of Belgium Fabrique Nationale (FN) models, they're a generally very competent company. Last time I checked they had the contract to make machine gun barrels and ran three hammer forges for this and other guns.