Marushin just recently released a limited edition replica of the Mateba Model 6 Unica Revolver. The gun in real-steel is one of the first and only autorevolvers in existence, and the airsoft one looks like a lot of fun, and with Christmas coming up I think I may get one. Its a limited edition run, and its made of HW plastic (plastic mixed with metal powder), and has wooden grips. The big letdown though, is that it only shoots at around 200FPS on HFC, but hopefully green gas will bring it near the mid 200s.
That thing at the end is a picture of a limited edition dummy round from Ghost in the Shell, which is a popular Japanese cyber-punk manga.