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.
Same principle applies to the frequent attempts to ban semi-auto rifles, when rifles account for 3% or less of all homicides annually.
Those kind of weapons are effective for defending / attacking a moderate sized area, unlike pistols and bolt-action rifles. Pistols are short range and bolt-action rifles are slow. It's obviously about the power that they don't want the people to have.