We had been following all of the shenanigans with the Double Tap Pistol since SHOT Show 2012. It seems Double Tap Defense finally worked out all the legal wranglings and are getting their Derringer style Over/Under two shot pistol into the hands of some shooters. Perhaps there are other videos out there, but this is our first glimpse of the DoubleTap being demonstrated by Gun Websites with its .45 ACP barrels. This can also be interchanged fairly easy with a 9mm barrel set up. As for functionality, you be the judge.