3D Printed AR15 Much Improved, More Reliable
Major improvements have been made in 3D printed AR15 rifles. The part of the rifle that is defined as a gun by federal law is the only part printed. The rest of the parts are commonly available on the free market.
People have made guns at home since guns were invented in the 1500’s or before. However, the ability to print out your own AR15 lower receiver at home, without having to use steel files, a grinder, or other home workshop tools, has caught the attention of the public in this digital age.
Defense Distributed is the organization that aims to make the promise of the Second Amendment a practical reality for everyman at the touch of a button. No longer will criminals in and out of government be able to be reasonably certain that their victims are unarmed.
The first AR15 lower printed by Defense Distributed was matched to a barrel chambered for the 5.7×28 cartridge, a pistol/rifle round less powerful than the more common .223. It failed after six rounds.
All of their design work and testing is now being done for and with the .223 cartridge. Several different printers and technologies have been tested. Stress analysis with sophisticated engineering design tools has been used to reduce the number of prototypes required. The lowers will now work reliably for 40-60 shots before failing. The highest round count so far has been over 80.
The failures occur at the rear take down pins, through to the hand grip.
Defense Distributed believes that their latest improvement will be reliable for 100 rounds. They expect to release the build files to the public in the next few weeks.
They will dedicate it to Joe Biden and company.
Dean Weingarten
2013-01-11 08:47:23
Source: http://gunwatch.blogspot.com/2013/01/major-improvements-have-been-made-in-3d.html
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