Dare to dream...
A national coalition of firearms and ammunition manufacturers is formed and all (domestic and foreign) are encouraged to join. At least everyone who sells their wares to American consumers. This coalition has only one stated pledge...
"We will never sell nor donate a specific product to any city, county or state government agency, including law enforcement and Guard, if this same product is currently prohibited for ownership or purchase by the general populace who reside within the jurisdiction of that agency."
Those manufacturers who are reluctant to join would be pressured to join by a consumer boycott by the gun community.