Looked for this skin from that video preview? Well, since that mod was hidden... Here, some old video:
If you still didn't get it - this is a custom skin for Signature .40 pistol (sinlge/akimbo).
My first attempt (actually, not first, but who cares) on skins creation, so, please, criticize as much as you want.
Check the "Images" tab now.
Other Vocaloid cutsom skins: HOLT 9mm || Vivid Bringing Predator 12G || The Disappearance Breaker 12G || Double Lariat