Arsenal Firearms' new double-barreled pistol can fire 16 rounds in three seconds by shooting two bullets at the same time.
So my friend makes working Destiny/MassEffect/Warhammer replica weapons from Nerf guns for a living. (Good friend to have)
These Custom Nerf Guns Are Just Insane! (They may just be Nerf but hot dang!
I want this gun, built to shoot 12 ga rounds
ArtStation - The hunting rifles of legendary hunters, Timur Mutsaev
This nifty spanish revolver fired off three rounds per trigger pull. The recent trend of double barrel guns is not so recent.