User blog comment:Codgod13/Spy tournament semifinals round 1: Tehspartan vs Reyesrebels/@comment-1017446-20110619232030/@comment-422690-20110620002228

The Hidden Blade from Assassin's Creed 2 onwards has a Hidden Gun attached to it. In Assassin's Creed: Brotherhood, it gets an upgrade to fire poisoned darts. However, they are considered their own separate weapons and are not part of the hidden blade itself.