[quote=PCSutfin]So with future-tech stuff, it's possible to make a silent automatic shotgun, right?

RIGHT?![/quote]

Automatic shotguns exist, and shoot about as fast* as the semi-automatic one in the video. So I imagine it could be done with modern tech.

*Actually slower. Automatic shotguns seem to peak at about 5 rounds a second, while the semi in the video was more like 7-9 a second. Which means your 20 round drum would last all of a few seconds.