“Smart guns” have been in the news recently. A gun store owner in Maryland abandoned plans to begin selling a German-made “smart gun” after protests–some of which included death threats. Such threats are crimes, and ought to be prosecuted, if the perpetrators can be identified. However, lawful threats, such as boycotts, seem likely to deter gun stores from selling the product. Gun owner boycotts and the risk of such boycotts have historically a very powerful check on the actions of firearms businesses. A firearms business which is perceived as anti-Second Amendment is not going to stay in business very long.