Saturday, August 22, 2015

PM422 Songbird 2.0 3D Printed .22 Design Updates

Part 1 - Part 2 - Part 3 - Part 4 - Part 5

Version 2.0 is ready to print! For the uninitiated, the PM422 Songbird is a single-shot .22 LR pistol that is 100% 3D printed with the exception of rubber bands (in place of springs) and a roofing nail to serve as the firing pin. Obligatory glamour shot:
Looks a lot like the first version, right? Let's break down the changes and improvements (photo heavy):

Friday, August 21, 2015

PRT22 Build Videos

Part 1 - Part 2 - Part 3 - Part 4 - Part 5 - Part 6 - Part 7 - Finished Pistol - Build Videos - Blueprints

The videos are done! That last one took months for some reason. Four build videos plus the assembly/test firing video at the end:

Friday, July 17, 2015

An Update

My dad died one month ago. It was unexpected. He was the one who got me interested in engineering and firearms (shooting at three years old!) and always supported my creative endeavors.

The last few weeks have been taxing to say the least. I've had just about zero downtime so far, and my summer will only get busier with all of the life changes that come with this. What this means for the blog is that I won't be able to finish some of the projects that I had been working on. Anyway when I started this blog I made the rule that every post requires a picture, so here's a photo of me shooting my dad's Savage 30-06:

Monday, July 13, 2015

PM422 Songbird Spotted in the Wild!

Part 1 - Part 2 - Part 3 - Part 4 - Part 5

An anonymous user has successfully printed and test-fired my Songbird pistol, this time using Taulman Bridge (a nylon filament) to print the barrel. The barrel survived 62 shots and it's still functional!

Notice the keyholed marks left on the target. 

More pictures and a range report after the jump.

Saturday, June 13, 2015

PM422 Songbird 1.8 Files Are Here!

Part 1 - Part 2 - Part 3 - Part 4 - Part 5

I've just released the files for version 1.8 of the Songbird 3D-printed .22LR pistol. Click here to go to the download page. Comments, questions, and suggestions are always welcome.

Tuesday, May 19, 2015

PM422 Songbird 1.7 3D Printed .22 is Alive! (The Love Gun)

Part 1 - Part 2 - Part 3 - Part 4 - Part 5

Awesome news! After a few revisions, FP of FOSSCAD has printed and tested my Songbird pistol. Some revisions I made since the initial concept include shortening the frame to allow for easier printing, extending the trigger and hammer pins, and enlarging the bore and chamber.

Oh, one other thing. One late night in the FOSSCAD IRC chatroom, the joke was made that rubber band-actuated guns might as well use condoms. Well, FP got wind of the joke and...see for yourself:

PM422 Songbird

That, coupled with the red, white, and blue color scheme, might make this the most American pistol ever created. Here's a video from FP of the test firing:

It works! This is a gun made from printed plastic, some rubber, and a nail and the thing actually works! FP printed two barrels. The first is my design, completely plastic which lasted three rounds before a casing got stuck in the chamber. The second barrel was modified to accept a steel chamber insert. That second barrel lasted 15 rounds and then ruptured just forward of the chamber insert, with no injury to the operator (barrel was ejected to the left). The frame was not damaged. But the important thing to take away from the test is that a printed barrel of just 22mm diameter can take the pressure of a .22LR cartridge as long as the barrel is held in compression. No more giant barrels to compensate for the low adhesion between printed layers! That's a serious step forward in printed firearm technology.

I've made some more revisions for version 2.0 which include a simplified barrel catch, relocation of the hammer bands to the inside of the gun, and more efficient printing.

Concerns? Suggestions? Tell me what you think in the comments.

Part 3

Wednesday, May 13, 2015

PRT22 Blueprints Are Here!

I just finished the blueprints for the PRT22. Click here to go to the download page. Let me know if you find any issues so I can correct them.