Some non gun belts are just fine... I am used to pants a size too big ( just a 44 instead of 42. gives me more room to move with longer legs, and room for my Kahr between my fat and my belt. so even if the gun isn't IWB i need a belt to keep them up without looking like a homie.
I have a pretty stylish belt by fat back tactical. it's a lot like a normal belt but velcro adjustable, and quick release... nice stiff nylon and holds up really well... you don't HAVE to have it. any good stiff solid belt will do... but I'd recommend trying one meant to fit a holster and hold it's weight up... sometimes you get lucky with regular belts but not often.