Interesting. I’ve never seen (nor heard) one of those before.
Pretty cool, I am surprised that they are... well I do not want to jinx it. Two rounds per trigger pull, one on pull, one on release/reset.
So while everyone was yelling at Trump and the Bumpstock fiasco we still had rubber bands, belt loops, and binary trigger groups. Reminds me on a real life story that happened to me.
We were looking at buying a piece of property. The guy who had it before built on it and installed a new septic tank. He found out he was on the wrong lot. Not his fault it was the county steered him wrong. So he jerked the Septic tank back out and took it with him.
I went to the county and asked what I would have to do to put another one in. Really cool gal said Mr So&So... You ALREADY HAVE a septic in. I said “no the guy took it with him”. Again she said “Mr So&So YOU HAVE A TANK!”
Oh crap... Wait... She is saying “shut up and just put another one in you dummy”, no permits, no red tape, no nothing. So the moral was even though they took Bumpstocks shut your mouth and get a binary system. And the less attention to that option the better. :)
I got one a few years ago. It’s pretty sweet.