In just three years, the ability for any New Yorker to produce a killing device in their own home has grown exponentially. In 2022, police said the lower receiver of a handgun could be made using most 3D-printers, leaving would-be gun manufacturers only to have to order the additional parts. Now, in 2025, about 96% of a firearm can be made in any home, leaving only screws and springs to be added to make it operable.