Electric drill-powered machine gun.
https://s3-us-west-1.amazonaws.com/h...n_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...386#post219054
https://www.homemadetools.net/forum/...429#post177507
https://www.homemadetools.net/forum/...652#post132853
https://www.homemadetools.net/forum/...536#post205333
https://www.homemadetools.net/forum/...8809#post88163
