The Metallic Missile was one of Yomega's first aluminum yo-yos, originally released in 1998. It is machined out of aluminum with a polished finish, and has rubber rings on the rims, similar to Came-Yo's Moonstar and Mondial yo-yos. It also features a special "Sandman" bearing for even longer spinning than with the standard roller bearing. When it was first released, the Metallic Missile was considered a very nice but expensive yo-yo, retailing at an MSRP of around $130 USD, on the tier of the SB-2.
First-release Metallic Missile in Gold (from Dave Schulte's collection)