After Gun Boss Armory opened for business Monday morning in a Redlands strip mall, Matt Nicholson was among those who walked through the door. "I've never owned a gun before," Nicholson told an employee behind the counter, who handed him a silver Beretta handgun from a display case. Nicholson, a 23-year-old Redlands resident, said he had thought about buying a firearm in the past. But the attack that claimed 14 lives at a San Bernardino social services center on Wednesday — about five miles away from Gun Boss Armory — made up his mind.