MI HB6228

Adds 3-D printed firearms to the list of prohibited weapons that cannot be manufactured, sold, offered for sale, or possessed under Michigan law.

Defines "3-D printed firearm" as either a complete firearm created using 3-D printing or any component of a firearm created using 3-D printing technology.

Defines "3-D printing" as the conversion of digital files into three-dimensional objects by continuously layering thin sheets of material.

Maintains existing penalty of up to 5 years imprisonment and/or fine of up to $2,500 for violating the prohibition on manufacturing, selling, or possessing prohibited weapons.

Preserves existing exemptions for federal government contractors, licensed manufacturers under federal authority, and self-defense spray devices.