The National Rifle Association represents deer hunters, self-defense and Second Amendment devotees. But in a very direct way, the NRA also represents Bushmaster, Browning, Smith & Wesson, and the rest of the gun industry. Gun-makers have donated at least $39 million to the NRA in recent years and have become deeply enmeshed with the organization. As a result, the NRA adamantly opposes virtually all restrictions on gun sales — even ones that NRA members support, such as requiring background checks at gun shows and banning sales to people on terrorist watch lists. Gun-makers can no longer depend on a shrinking …