Chuck Schumer will introduce legislation to make it illegal to make guns with 3-D printers, according to the Huffington Post. He’s expected to introduce the bill in the Senate next week.

“Sen. Chuck Schumer (D-N.Y.) will put forward a bill on Monday … containing a provision targeting plastic guns made with 3-D printing technology. Specifically, his bill would require that guns contain a piece of metal that is intrinsic to its operation, such as in the barrel or the trigger handle, rather than an extraneous piece that could be removed before a gun is put through a metal detector,” reports the Huffington Post.