3DP printed case for your 38 launcher ammo
u/Advanced-Payment-358 · 2021-12-21 20:22:28 UTC · score 69
The slide mechanism that I designed for rifling works flawlessly. Once set, it will allow a single pass rifling of barrel of theoretically any length, if the setup is constructed as such. For very long setups, I would obtain a thick walled hydraulic tubing with suitable ID to work as …
u/Advanced-Payment-358 · 2021-11-25 22:55:03 UTC · score 23
While ordinary steel comes out mirror finish, tempered 4140 seems to require some extra attention. I was disappointed when I first dropped the button through. For the defense, the pictures are taken with macro camera, and the lands and grooves difference is 0.1mm or about 4 thous, so …