Oh, the Korean K2! And nicely done! (It was the rifle of the Peruvian marines in the late 80s, early 90s, I had seen the rifle with a bayonet similar to the American blade, but I don´t know if there is a proper south Korean blade for it). Well done, Dalamace!
I think that this is the last german made LMG used during the Spanish Civil War, the Bergmann MG-15 nA:
A short recoil, belt fed and air refrigerated gun in its actual form. Was derived from a medium water cooled machine gun, which was modified as a defensive weapon for aircraft, and then further developed once again for ground use. It was a desperate German answer to the need of a more portable gun than the MG-08. Unfortunatelly the gun overheats after 250 rounds of sustained fire, so for a continuous fire, several guns must be grouped, or it was used in mobile parties with not requirements for long sustained fire.
After the war, it was used by Turkey and in China during the warlords era previous to the Japanese invasion of Manchukuo, finally by both sides during the SCW. Cheers.