Summary

Spring powered, mag-fed single shot penny launcher

Current version doesnt have a mag catch and uses locating pin and friction fit, so accidental unloads are possible

Can be made with "200 Piece Spring Assortment" from Harbor Freight
If not purchased use:
4- 9x35mm springs (3 stacked for slide spring, 1 for mag spring)
1- 7.5x12mm spring (trigger)
1- 7x 50 extension spring (bolt)
1- 3x25mm socket cap bolt and nut (trigger)

Assembly:
Install trigger spring, bolt trigger in place, then use a cut piece of filament as a hard stop for trigger catch
Place bolt in frame channel and install extention spring on bolt and frame attachment point
Place 3- 9mm springs in sleeve of slide and load slide assemble on frame from front muzzle end
Slide the Assembly slightly past block at rear of frame to install the slide block
Put spring in magazing, then put follower in and rotate

Enjoy your penny pelter, and feel free to reach out if any of you would also like the STEP files to make some more in depth remixes