Gun rights advocates say ... the make and the model. PMFs can be created with kits bought online that are unfinished and must be put together ("buy-build-shoot" kits) or they can be produced by a 3D ...

The use of auto sears spiked in the past decade, partly because they can be made inexpensively with 3D printers. From 2012 to 2016, just 814 machine gun conversion parts were taken into custody by ...

Two men from Colorado Springs are accused in a nationwide machine gun scheme. Federal agents say the pair was running an ...