The Vulkan-5 presents some extremely interesting design choices by the developers towards helmet balance. First things first: the protection.
The Vulkan-5 is a class 6 base armored helmet that weighs more than any other helmet in the game, but offers full head protection from nape, head, to ears. As a result, it also offers some heavy turn speed, movement speed, and egronomitry penalties, too. The turn speed, at 33%, is particularly harsh.
Unlike the aforementioned class 5 armored helmets, the Vulkan doesn’t actually come with a faceguard. It comes with a face visor, making it immediately worse when taking bullets to the face, despite a high ricochet chance, but all the better for utility in reducing blinding effects.
This makes the Vulkan a thinking player’s helmet, a lucky player’s helmet (lest those bullets find you head on,) and a rich man’s helmet. Happy days.