This is the biggest pile of wanky wank I ever saw. It's a bow thingy with a pistol trigger. So you shoot arrows as if they were bullets. And you don't even need to reload the 'arrows'. So it's just like a real bow then?
It's not even like a crossbow - crossbows do have triggers but they still need to be cranked back each time a bolt is fired.
Looking at the YouTube video above, it still seems an utter waste of pointless space & difficult to store - and more expensive and less fun than a real bow - but they seem to be selling it as a static flex workout accessory. That seems to make slightly more sense. Holding a tension for several minutes is a bit of a (very mediocre ) workout. It's still useless rubbish though.