A good rule of thumb for those not initiated into metal spheres: aim for the stuff that upsets metalheads. Generally, this means the band in question is pushing boundaries and pushing buttons, something that Inter Arma does exceedingly well. The Richmond, Va. quintet is making a quick return to Florida after a handful of dates with locally-based homies set and setting, but this time around is sure to be a special treat. They’re opening for Canadian noisemakers KEN mode, which blends the seemingly disparate worlds of gritty noise rock and gloomy hardcore. So if you think you might have a taste for the heavy stuff, but aren’t quite sure where to start, Orpheum on Tuesday night is the place to be. Also performing: Reveal Renew.