Budget includes new firearms rules: bans on easily convertible pistols and a process for 3D-printer controls

Provisions within the budget bill debated May 20 would restrict the sale of pistols that are demonstrably susceptible to conversion into rapid-fire weapons using aftermarket 'auto-sear' devices and would create a multi-step implementation process to limit 3D printing of firearm parts.

The sponsor said the device used to convert pistols already can be illegal, but that criminals are increasingly using small converter devices and 3D-printed parts found at crime scenes; the measure would make dealers responsible for not selling firearms that are easily converted, with limited grandfathering for existing owners and licensed federal firearms dealers.

Senators questioned how the statute would identify which models are "easily converted," whether popular models would be effectively banned in practice, and whether the measure duplicates existing federal prohibitions. The sponsor said the statute uses technical definitions and consumer-protection principles and that a regulatory and public-comment process would guide implementation. On 3D printers, the bill directs an expert convening and a rulemaking timeline before any sales prohibitions take effect.

Opponents said federal bans already exist and argued the measure would penalize lawful owners while criminals would still obtain illegal devices. Supporters said the goal is to reduce the presence of conversion devices and untraceable firearms at crime scenes.

Next steps: rulemaking and technical work to define "easily convertible" models and to establish any technology standards for 3D printers will follow implementation pathways laid out in the bill.