3D Printer AR Lower Tested to Destruction

Given all the OMG gun control hubbub surrounding the 3D printer AR lower project, you’d think the guys could buy a wind sock for their microphone during its initial live-fire outing. Then again, Alexander Graham Bell’s first words on a telephone instructed his assistant to hang up. The not-quite-ready-for-prime-time-printers at Distributed Defense have some sage advice for those attempting to replicate their little feat. “Test firing a printed (ABS-like Objet photopolymer) AR receiver in 5.7x28FN. Lower max PSI than .223, but broke the buffer tube ring within six rounds. We do not recommend printing a lower receiver for a rifle setup until the file can be further reinforced.” Damn! Now I’ve got to find something new to do this weekend.