In a fully expected turn of events, Congress reauthorized the Undetectable Firearms Act, or UFA, of 1988 on Monday and it was signed into law by a signature machine at the White House since the President was out of the country. It seems appropriate that a bill banning imaginary firearms should receive a fake signature, but it is frustrating and disappointing nonetheless, especially in light of the fact that the bill was supported by the firearm industry’s trade association, the NSSF, and unopposed by the NRA.
While it is theoretically possible to make a working firearm from materials other than metal, it would be a stretch to call such firearms “functional.” The energy produced when an ammunition cartridge is ignited is significant. If the cartridge is not fully supported in a way that will contain and direct the pressure, the result is catastrophic failure – in other words, the gun blows up in the shooter’s hand. A cartridge is like a powerful firecracker. The chamber and barrel of a gun are designed to contain the energy and direct it down the barrel, propelling the bullet in front of it.
Recent experiments in 3D printed plastic firearms are an example of proving that a concept works while simultaneously demonstrating that it is impractical – even while throwing the mainstream media into a panic over the “new threat” to public safety. In order for the plastic gun to be strong enough to contain the energy of a fired cartridge, the plastic must be so thick that the gun is extremely bulky, about the size of a typical hairdryer, and the barrel must be very short – almost non-existent – in order to let the pressure out quickly. That makes the guns very inaccurate. Unlike steel, the plastic withstands the pressure by flexing – like a balloon inflating and then returning to close to its original size. To reload, the barrel must be removed and either a new barrel installed, or the spent case must be knocked out with a dowel and a new cartridge forced into the chamber. Then the barrel can be reinstalled and the gun fired again, but each firing stretches and weakens the plastic, increasing the odds that it will fail and explode in the shooter’s hand.