I just came across this while perusing Buds site.
Apparently it's a revolver that fires 2 rounds, from side by side barrels, with each pull of the trigger. Not a derringer, because it holds a total of 8 rounds. I have owned a DP-12 from this same company and while that one has side by side barrels, each trigger pull only fires one barrel, so not the same concept.
Looking closer at the gun, it appears that there are actually 2 triggers, which may be how they are avoiding the ATF ban on firing more than one round from a single trigger pull. But given that you can apparently pull both triggers simultaneously I'm not sure how this is different than the ATF's redefinition of "one trigger pull" in their bump stock confiscation where they defined that to mean, effectively, "one motion of the trigger finger".
https://stdgun.com/s333/
Std Mfg S333 Revolver
Moderator: carlson1
Re: Std Mfg S333 Revolver
I watched part of the video... the lack of a trigger guard and the giant double trigger thing, combined with obvious heavy and awkward pull (as evidenced by the shooter in the demo) I had to bail out. That's 60 seconds I'll never get back. 
