Wired reports last weekend a 47-year-old West Virginia carpenter who goes by the pseudonym Derwood released the first video of what he calls the Shuty-MP1, a “mostly” 3-D printed semi-automatic firearm. Like any semi-automatic weapon, Derwood’s creation can fire an actual magazine of ammunition—in this case 9mm rounds—ejecting spent casings one by one and loading a new round into its chamber with every trigger pull. But unlike the typical steel semi-automatic rifle, Derwood says close to “95 percent” of his creation is 3-D printed in cheap PLA plastic, from its bolt to the magazine to the upper and lower receivers that make up the gun’s body. But unlike other 3-D printed weapons that have spooked gun control advocates and raised thorny First and Second Amendment questions, the Shuty-MP1 is far from a fully printed firearm. Derwood’s “95 percent printed” description may apply to the overall material that makes up the gun.