[jester]

I have seen the same book, and the colour plates ie cartoons showed similiar.

Here is an issue, one due to recoil when using shotguns in the 12 gauge catagory sawn off to that level tend to blow the users head clean off, thus I call BS!

And yes its a single barrel, but the recoil and "whip" action will mess up the shooter.

And a generous GM giving the players such a weapon should be mindful that using buckshot or flachette well, there would be no arming distance so pooff the hostiles get all the negative effects.