Rep. Steve Israel (D-N.Y.) and a group of Democrats have proposed the Undetectable Firearms Modernization Act, legislation that would require all guns to contain enough metal to be detected by metal detectors and X-Ray machines at checkpoints and airports.

The legislation would require that all guns, plastic or otherwise, contain a non-removable strip of metal which would be illegal to remove. The legislation was first proposed in 2013 and failed to pass but given recent TSA lapses, including the discovery of 73 TSA agents with “ties to terrorism,” it’s clear that the legislation could get a bit more attention.

While the legislation would still allow manufacturers to build partially plastic guns, it would close a loophole that allows people to build guns that can evade security, said The Hill. Current law prohibits plastic guns, but gun owners can get around the requirements by including a detachable strip of metal on an otherwise plastic gun.

Criminals can then remove that piece of metal when they go through security.

To combat this problem, Israel’s legislation would mandate that a major component of each gun be made of metal and that the weapon would be inoperable without that component.

The legislation was previously introduced in 2013. Back then, it was supported by Reps. John Conyers Jr. (D-Mich.), Elizabeth Esty (D-Conn.), Jim Himes (D-Conn.), Mike Honda (D-Calif.), Jim Langevin (D-R.I.) and Pete King (R-N.Y.).

Sens. Charles Schumer (D-N.Y.) and Bill Nelson (D-Fla.) are also working on similar legislation to prohibit plastic guns, which could be introduced in the coming months, reported The Hill.