Spidey Disc Launcher Mark-III (Quick-Eject)

Hey everyone! This is Mark III of my wrist-mounted disc launcher series.  The Mark III Wrist-Mounted Disc Launcher is a fully 3D-printed, four-disc launcher with a removable cartridge and satisfying quick-eject mechanism.  Recommended material: Print the launcher in PLA or PLA+ only. Other materials may behave differently in the launch and return spring, snap-fit, and moving components and are not recommended unless you are prepared to test and tune them yourself.   Prepare before assembly: Flush cutters or side cutters Spare 1.75 mm filament for hinge and pivot pins Small amount of lubricant Preferably silicone dry lubricant spray, plastic-safe lithium grease, or another lubricant confirmed to be compatible with plastics Basic cleanup tools for removing supports or excess material BUILD WITH ME:    Link to the ASSEMBLY VIDEO:     Best practices:  - Before firing, lightly press the trigger to make sure the discs are feeding freely.  If anything feels stuck, stop and check the mechanism rather than forcing it. - After each shot, let your fingers come off the trigger cleanly so the return mechanism can reset quickly. Questions, build photos, modifications, and feedback, feel free to reach out!   THANK YOU to everyone who has followed this project, tested previous versions, shared feedback, posted builds, and supported its development from Mk-I to Mk-II. A large part of the Mark III exists because of YOU. (description last updated: August 17, 2026)