Required for Dual Guns?

I heard they're just buffs, do you really need Bullets in order to fire them Pistols?

No, this was confirmed a while back. The extra bullets are just that, extra. They give extra damage but you don't need them.

Attempting to reload without bullets in inventory: http://puu.sh/3DZyU.png

Then who the hell put "bullets are required to attack." on the Dual Guns List page?

According to someone on my server, the "dont need bullets to attack" was only a test feature in KR.

We need more heads on this then.

Another thing, I also heard you can't actually equip Bullets?

You don't equip them; you use the Reload skill with them.

I'm lost at how the ammo works with them... Its not the same as regular Missiles?

You have an ammunition bar under your character while a gun is equipped. You reload that bar with bullets. Without ammunition, you cannot attack.

Mm, its one bullet per reload, rather than x bullets per reload for the full canister?

Yes, 1 bullet will reload an entire dual gun's magazine.