Defense Distributor Defense Distributor

Cody Wilson, founder of Defense Distributed, at his shop in Austin, Texas, last month. On Tuesday, the company announced Wilson resigned and severed all ties with the company on Sept. 21. Eric Gay/AP hide caption

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Eric Gay/AP

Sens. Edward Markey, D-Mass., left, and Richard Blumenthal, D-Ct., display a photo of a plastic gun Tuesday, as they call for President Trump to reverse an administration decision to allow a Texas company to make blueprints for a 3D-printed gun available online. Trump announced over Twitter that he is "looking into" the sale of 3D plastic guns to the public. Matthew Daly/AP hide caption

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Matthew Daly/AP