Untraceable Firearms Act of 2021

The Untraceable Firearms Act of 2021 aims to regulate "ghost guns" by requiring that core firearm components, such as frames and receivers, be treated as completed firearms under federal law. This would require these parts to have serial numbers and would mandate that buyers undergo background checks before purchase, even if the parts are sold as kits or are unfinished. Additionally, the bill updates the definition of "undetectable firearms" to ensure that all guns contain enough metal to be identified by standard security screening equipment like X-ray machines and metal detectors.