Most rogues are going to need to use hard Knocks to hit with this weapon. The damage is good, but it's quickly going to become an expensive weapon either from action uses, resource uses to buy success, or both.
Then along came sawed off shotgun. You'll have to boost that just as much as you would this gun, but succeed and you get a big pay out.
All In all, this is the ideal gun build for rogues that don't want to risk a lot... which is the opposite of how I typically play rogues. The rogues that want to go all in on a test to one shot a boss though probably want to stick with sawed off instead.