Ar15.com user [HaveBlue] has been working for some time on a 3D printed lower receiver, and now reports that the parts are fully working. Using a Stratasys 3D printer from the 90’s [HaveBlue ...

For instance, in 2019, a man who was barred from having firearms because of a domestic incident was found with a 3D-printed AR-15 and a list of lawmakers' addresses, according to federal officials.

this 3D printed AR-15 lower receiver is the only part of an AR-15 that contains the ID markings and serial number. Legally, the AR lower is the gun, and requires a background check to purchase ...