lets take this scenario another way.
In your SUV, half a block away, you have your shotgun of choice, carbine of choice, handgun of choice.
But that is half a block away. You don't see any immediate rioters, but you hear noise and see smoke. Your buddy Frank says 'get the he!! back in here you fool' from the back supply room (which has just 2 small narrow windows, but a solid door to the alley, and a solid door that opens into the buisness proper...lets say a shoe store) Frank is a shooter, a CCW carrier who may have a decent handgun on him, or maybe because it is hot he just has his little 32, or maybe he didn't bother today. Frank sees you consider and says 'Don't forget I got Dad's guns in here, had em ever since we had this store!' Which you know are a double barreled 12 guage, at least 2 new full boxes of buck for them, probably a few boxes of 'pheasant loads' from 1970, a bolt action .22LR with at least half a brick of plinking ammo left, and an old .45 SAA with a box of 50 LWC frank picked up at walmart a few few years ago.
Do you dash half a block and grab your own gear, or do you stay inside/on the roof with Frank's dad's gear, at least until you can get a better read of the situation and determine if or when you can get to your car and weapons.
Note, your weapons are through the magic of the internet, unable to be used by the rioters, even if they did find them (no ammo, partialyl disassembled, divine invervention, quality locking cases, whatever) and your SUV and it's contents are insured.