Nongun manufacturers across the nation routinely control how their product is distributed and impose contractual obligations on wholesalers and retailers. Gun companies should have to use a similar approach. They should sell their product through only authorized dealers. And the authorized dealers should have to keep track of how many times they got "trace" inquiries from law enforcement—that is, how many guns they sold were later used by criminals.

Dealers that sold a disproportionate number of "crime guns" would have to fix the problem, something that might be as easy as retraining staff to react to "straw" purchasers who were trying to evade existing laws. Data showing that a high percentage of guns used in crime come from a small subset of dealers suggest that closing these few retailers could have a dramatic impact on access to illegal guns.