3. The German MG08/18 MMG (weapon 122) has a range of 30. I believe all other MMGs have a range of 24
Water-cooled tripod-mounted MGs tend to have in-game range of 30, while air-cooled ones usually have a range of 24.
That 08/18 certainly looks like it has water-cooling.
I know it looks like that in many OOB, but I’ve seen a few air-cooled HMGs with range 30, like the Japanese Type 92 and the French FM14. Which is why I thought the distinction was MMG/HMG not air/water.