single is favoured because its less glitched.

seeing as the shotgun gets "whipped" out by only 1 side, its not alot of area to pb.

seeing as dual sgs come out from both sides, sweeping down, all u gotta do is rss near an enemy and you'll pb.

dual > single

thats why no one likes dsg users.

and im not makin shit up, most dev's know this.