ATF demonstrates 3D-printed 'machinegun conversion devices'

An ATF official shows a Glock-style pistol converted with a 3D-printed “machinegun conversion device” and 30-round magazine before a demonstration on a range the ATF uses to test firearms.

An ATF official demonstrates the power of 3D-printed “machinegun conversion devices” in a Glock-style pistol on a range the ATF uses to test firearms.

3D-printed firearms and conversion devices sit on display during a demonstration by ATF officials.

A 3D-printer creates a “machinegun conversion device” during a demonstration by ATF officials.

An ATF official shows how simple it is to install a “machinegun conversion device” during a demonstration.

A 3D-printed “machinegun conversion device” (orange) is installed in a 3d-printed Glock-style pistol for demonstration purposes.

The afternoon sun illuminates the sign outside the ATF offices in Martinsburg, WV.

3D-printed firearms and conversion devices are displayed during a demonstration by ATF officials.

An ATF official points out a 3D-printed silencer among other devices during a demonstration.

An ATF official shows off a single-shot 3D-printed pistol during a demonstration of 3D-printed weapons and conversion devices.

A firearm sits ready for a demonstration of 3D-printed “machinegun conversion devices” on a range the ATF uses to test firearms.

Spent shells fill a trash bin on the ATF range where they test firearms and conversion devices.