Earliest 'Assault Weapon'

[AJAX22]

Whatta bout the 1903 with that attachment/mag to turn that sucker into full auto??????????

Thats the penderson device that was mentioned earlier. however it was never put into service and never comercially available

[Spiggy]

The Le Mat revolver, it's a high capacity revolver with a 20ga shot barrel in it!

-Or is that a destructive device?

[Tweak338]

Rock?
or the Italian-made Cei-Rigotti, developed in the 1890s