I like it! I'm going to attempt this when i get my paycheck. But the only thing is that with the way i aim a pistol(like a rifle) is that a cable is gonna smack my face and stuff like that. Sorry haven't really read it at all just looked at the pictures, is there a wright up?
I highly doubt it could be done starting off with a nerf gun. There (as far as I know) is no Nerf revolver with only 4 barrels. Maybe an older gun has it, but nothing you could buy today. Scratch builds are always possible, but it doesn't sound like that's something you have access to.
Thank you for your feedback, for the 4-barrel revolver there is the Airtech 1000 and 2000 as far as I know.