This is a single-shot, single-action 3d-printed pistol chambered in .22LR. It operates under a principle wherein the frame holds the barrel in compression axially and prevents the barrel layers from separating. This allows the barrel to be smaller in diameter than previous, unsupported designs. 100% printed barrels are not intended to have a long service life.
Special thanks to FP of FOSSCAD for printing and test firing this design.
#### Test Record
Version 1.7 was printed with 100% infill in ABS on a Rostock Max. The 100% printed barrel withstood 3 rounds without rupturing. The casing became stuck in the barrel and testing could not be continued on the firearm as designed. A printed barrel with a chamber insert lasted 15 rounds before cracking between layers, just forward of the insert, without harm to the operator. Two more 100% printed barrels were made and had a very short service life. A rifled barrel insert was used in a printed barrel that was modified by FP. This lasted many rounds and is still in service.
An unknown version (presumably 1.8) was printed in ABS by an anonymous user. The barrel was printed using Taulman Bridge (a nylon filament). The barrel survived 62 shots and is still functional.
* Install the legally required amount of metal in the grip using high-strength epoxy. Use acetone or epoxy to secure the Frame Cap.
* Fit barrel to frame by sanding the front or rear end. With a round in the chamber, the barrel should be tight enough in the frame that it will not fall out even with no barrel catch.
* Use a 2mm, a 3mm, and an 8mm drill bit to ream appropriate holes.
