Semi-Automatic .22 Pistol Design For 3D Printers

    Proteus at the DefCad forums has published CAD files for “The Brick”, a 3D printable semi-automatic .22 LR pistol. The gun is mostly made out of ABS plastic, even the bolt and barrel, but it does require a number of metal components, including an AR-15 semi-automatic fire control group, firing pin and buffer spring as well as a Ruger 10/22 magazine spring, a 1x8mm metal insert (for the chamber) and .44 caliber lead bullets or equivalent (inserted into the bolt to provide weight).


    As far as I know, this design is theoretical and nobody has actually fired it. Given the venerable .22 round’s rimmed design is infamous for causing feeding problems, I am going to remain skeptical that consumer 3D printers are a practical, and safe, method to produce semi-automatic firearms in their entirety.


    Many thanks Eric for the tip.

    Steve Johnson

    I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!