Ah, ok. I'd love to see six-shot version when you're finished. I love revolvers, especially ones with interesting designs.
Hmm...I've never heard of the Diamondback or the S&W M360 Sakura. I did a google search on both of them, though. The Diamondback is easily one of the coolest and most interesting revolvers I've ever seen, but I can't find anything about the M360.
Boo yeah! Love it! Looks like it fires from the lower barrel (to reduce felt recoil...) but I could be wrong. There is much I would give to have this in object (OBJ) format, and I'd sell my family to have it as a Poser prop or character. Oh well, that will never happen, but a man can dream...
I took a look at the Rhino when I was working out technical details of the gun. The stub version did end up being looking pretty similar, although the general aesthetic is meant to be closer to the magnum revolver from the new Deus Ex.