I have seen weapon kits for 10/22's and AK's were you mount 2 or more weapons on a tripod type mount with the crank. I have also seen smaller versions of the original made for .22 but damn they are expensive.
Is it legal to make your own? Would they have to be preban's etc? I was thinking about making one with 2 NHM91's. LMK Please, or if anyone has made one or seen one , tips would be helpful. Thanks.

I have one that uses two ar15 flat tops. All legal since you have to pull the trigger (nothings happens yet) then you can crank. Spit 60 rounds out in a few seconds. I also built a 10/22 kit very similar to the Calico kit. I made a few improvements to mine. I had to make the cam unit moveable front to back so you just can't walk up to it and start cranking. I believe my kit is under 4 pounds for the unit. All aluminum and plastic and stainless steel screws. Use delrin for the cam units...very strong and self lubricating.

Have fun
Rick