Crime And Gun Sales

Perusing an article at Alphecca about the Norwegian mass killer getting 3-1/2 months per victim, and recalling the usual run on guns following various mass killings here, I'm wondering if the surge in sales is a 50-50 proposition in which people see both the ineffectiveness of the police when time is critical, and the government predilection towards disarming the potential victims of the next mass killer or crime victim.