No background check. No age check. No permission. No Screening. Just a 3D Printer, design, and the materials to do it.

In June, a gun-rights group, Defense Distributed, reached a settlement that allows 3-D printable gun plans online. The plan wasn’t supposed to be online until Wednesday but more than 1,000 people had already downloaded plans to print an AR-15 style semiautomatic assault rifle, according to the office of Pennsylvania Attorney General Josh Shapiro.

The settlement ends a multiyear legal battle that started when Defense Distributed founder Cody Wilson posted designs for a 3-D printed handgun he called “The Liberator” in 2013. The single-shot pistol was made almost entirely out of ABS plastic — the same material Lego bricks are made from — and could be made on a 3-D printer. This no longer requires a lot of specialized materials.

Twenty-one state attorneys general sent a letter to Secretary of State Mike Pompeo and Attorney General Jeff Sessions Monday, urging the government to withdraw from the settlement.

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