NY bill would require a criminal history background check for the purchase of a 3D printer::Requires a criminal history background check for the purchase of a three-dimensional printer capable of creating firearms; prohibits sale to a person who would be disqualified on the basis of criminal history from being granted a license to possess a firearm.
You can 3d print the lower receiver, which is considered the “firearm” for regulation purposes. All other parts can be bought without background checks. The lower on the AR15 isn’t pressure bearing, and can be 3d printed to be as strong as it needs to be.