Double barrel 45cal pistol: AF2011-A1 "Second Century" - Double barrel pistol - YouTube 
I’ll see your video and raise you this one:
https://www.youtube.com/watch?v=UkIgo4AnRdU
This was the first thing I thought of when I saw that 45 
cool!
remember taking some fellas to shoot clay pigeons. One had a side/side double 12gauge.
he asked if a guy could shoot both 
i put 2 shellsin and shot, he said 
i loaded 2 magnum ssg’s, and gave it back to him. His feet left the ground…
Very impractical, very heavy and one H*LL of a kick. If you don’t know how to use a 1911 then you shouldn’t even consider this one.
Like one goy mentioned in the comments section; if you were to get a hang-fire (where it takes a small amount of time for the round to actually fire) with this thing, the cycling of the slide go very well have that round spinning out of the ejection port when it actually goes off!
Of course, this could be a great example of Darwinism if the spinning round were to go BANG when it was pointed at the shooter.
All told, this pistol is the manufacturer’s example of a two headed chihuahua; not only useless, but even more dangerous than it’s worth.
I can hear it now: “Well I got the bad guy… but if Grandmaw was only standing on the other side of him, she wouldn’t have been hit by the second slug!”
BTW, I’ve got a better pistol video… - YouTube A double barreled 20 gauge pistol. Yeah, it burns blackpowder, not the so-called smokeless powder; so the felt recoil, while just as strong, kind of “builds on you” as opposed to instantaneously kicking at you. Actually gives you an opportunity to control the muzzle’s attempt to smack you in the forehead. (Been there/done that with my 4" barrelled S&W 629 .44Mag) With 50 grains of powder behind the shot; you’ve still got a 20 gauge pistol in you hands. Could be worse, the “old-time” British hunters loaded one barrel up as a shotgun; the other barrel was a roughly 325 grain, .600 caliber (diameter) patched lead ball. By comparison, the common 9mm “defense loads” are usually pushing a 110-125 grain .356 caliber slug, .357’s are usually 125-158 grains in weight and .357 caliber, .44 mags are .429 inches and 225-250 grains, and a .45ACP round (only one, not two like the double-headed pistol in the OP’s video) is at .452 inches and around 225-240 grains in weight.
OBTW, not too much recoil on that 20 gauge load in the video I posted; shotguns DON’T have as much recoil as a comparbly “sized” rifle, when you consider the difference in powder charges and weight of the actual “load” of lead/steel/copper. Pistol/rifle slugs are an interference fit in the barrel; which means they commonly don’t leave as fast; allowing the chamber pressure to build up a bit more (which means more recoil or “kick”) before they exit the barrel.
In simple (for gearhead) terms: A shotgun load is like a short-stroke engine; takes a little longer to get the RPM’s up, then screams at the top-end.
A rifle/pistol load is like a 351 stroked to 393 or 408, or Royce’s 454ci FE in “The Tool”; Things get moving faster, but your head gets planted in the seatback and you have to grab another gear sooner.
I still like my Smith .44 with 9-10 grains of Unique pushing a 250-grain lead semi-wadcutter; but my Replica Remington “New Model Army” (an 1863 design) with a 30 grains of black powder or Pyrodex ("synthetic black powder) behind a 230-grain lead round ball spins the steel targets with just as much ‘authority’, and my arthritic wrists and hands can hold it for more shots. 
Ok I have to say I am by far one of the least informed people when it comes to guns. I own two and have fired my fair share. It’s just seems that the videos posted in this thread seem “wimpy”( in a cool way 
). That being said I would never want to be on the wrong end of any gun especially the ones in these videos and least not the one in the video I’m posting. It’s cool and mean! 
Steven
The Worlds Deadliest Shotgun
