Twin 7/32" Big Gun Cannon 2.0

This is the production version of the cannon that I am installing in my Mikasa. It has a number of improvements over the first version uploaded. The Magazine Breech layer and Piston layer have been merged into a single piece to improve reliability of the pistons, and holes have been added for 6mm magnets to improve feeding if desired. Rotation has been upgraded to use a press-fit ball bearing instead of a bronze bushing. All small threads for the valve and magazine have been converted to brass heat-set inserts for strength and long-term durability. The valve now uses a double O-ring seal to improve reliability, and a larger buna ball is fitted to improve flow and prevent valve jamming. The Actuator Threads have been separated from the valve body and a calibration piece included, allowing this specialized thread to be 3d-printed without need for an expensive custom die.
As always, the original Fusion 360 files are included alongside the .stl's to allow the end user to do any necessary tweaks.