Nov 172018
This looks like an interesting piece:
An all-metal (steel and cast aluminum) California Arms Co. “Defiance” 20 gauge side-by-side shotgun pistol from the 1920’s. Only 300 or so were made, and of course the NFA put an end to low cost short barreled shotguns in the 1930’s. But the design looks not only practical but simple, the sort of thing that could probably be readily modeled in CAD for either 3D metal printing or (more reasonably) CNC milling. Seems like the sort of thing that could have a set of easily swappable barrels of different length, down to just a few inches.