From BoardGameNews.com and Repos Productions:
At Spiel ‘07, Repos Productions gave away a gray foam Uzi to everyone who had preordered a copy of Yakuzas, the first expansion for Ca$h 'n Gun$. For those who couldn’t make it to Essen, Repos is releasing the Uzi as the second expansion for Ca$h’n Gun$.
The Uzi expansion pack, comes with the weapon itself (in black) and the special power card that can be shuffled into the main deck. The Uzi treats its holder’s Bang! cards as Bang! Bang! Bang! cards instead. Itchy trigger finger, and all that. This expansion is limited to 2,000 copies, and there’s no word on distribution outside of Europe at this time.