Require manufacturers of ammunition to develope, implement and maintain a tracking system for ammunition which can be monitored by law enforcement.
Require a state-issued ID for all purchases of ammunition sold in the USA and hold the purchaser reasonably accountable for discharge of the ammunition purchased.
Technology:
The science and technology are available to place micro particles in ammunition identifying the manufacturer, batch, lot and purchaser.
Benefits:
Preserving the constitutional right of the Second Amendment to bear arms.
The huge savings of tax dollars by allowing law enforcement another tool in solving serious crimes, matching the bullet to a purchaser and not just a weapon.
All cost will be borne by the manufacturer and/or the consumer of the products.