So, this has been something I've been working on for a while on my own.

Shout out to u/plasticblaster, the EZ22 is what got me into the 3dp2a scene. The ez showed me how simple a firearm could be, and is the main inspiration for this project. Also, BLC's harlot, for teaching me how to utilize the FDM at its maximum potential.

This is an upper receiver for an AR-15 platform. It's modular, serviceable, easy to print, easy to build. Completely DIY, other than the liner. Serviceable, no JB weld other than the liner onto the barrel. Parts are designed with easy printing in ABS, or other difficult materials. Tested in ABS, PLA , and plain old PLA (a couple TPU parts for the heck of it). Pretty much everything can be made with subtractive manufacturing as well. Printed parts for the upper are well under 400 grams. Bolt assembly is heavy enough for any 22lr you can throw at it.

Plenty of flat blank space for your textures, designs, wifus, and Choco cats, I just left open infill for print Time, and material savings.

It's built out of junk. Piece of 2020 from an ender, 6mm linier rod/bearing from a monoprice mini. No hassle steel extractor and ejector from household items and hand tools. Can use rubber bands for the main spring if you desire.

You heathens named my last gun design GARY, help me with a name for this one.

One or 2 more test sessions and a write up, and I'll send her out to sea.