User blog:Xanneer/Arm cannon

Ok, so I got a minor dilemma. So the basic gist is that one of my OCs uses an arm cannon/rifle. It goes completely over and around his forearm. My question is which arm should it be? Hes right handed, so I assumed the best place for an arm rifle is on his dominant arm, but now I'm having second thoughts. As we all know, you use a weapon in your dominant arm/hand, but when it comes to an arm mounted and attached weapon, should it go on the other arm? Plus theres the fact that the rifle can transform into a shotgun shield, and shields are usually on the non-dominant arm.