You might also sell terrorists or lunatics things like moving vans, diesel fuel, fertilizer, box cutters, machetes, garbage bags, duct tape, . . .
What makes firearms any different?
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman