Vulkan's rule states that Flamers, Heavy Flamers, Meltaguns, and Multi-Meltas are twin-linked for his army. My question is which weapons is this inclusive to? Only those 4 weapons, or variants of those weapons as well?
For example, is Vulkan's gauntlet twin-linked since it fires "like" a Heavy Flamer, or is it not because it isn't one?
Other examples: Seraphim Hand Flamers (fire as a flamer), Combi- weapons (fire as a meltagun or a flamer, Ardent Blade (fires as a flamer)... I am sure there are lots of examples.