Something similar happened a couple of years ago in Florida.
3 guys at the range/store were leaving. The range/store had a policy of no loaded guns outside of the range area. So the 3 guys walked out of the range/store with their unloaded and encased pistols.
When then pulled into their driveway at home, a car pulled up and blocked the driveway. 2 guys jumped out and robbed the 3 of their unloaded and encased guns.
A review of the surveillance tape at the range/store showed the perps walking out behind the victims.