Flasutie has revolutionized the world of foam dart guns with their custom hydrogen-powered 40mm cannon. The impressive size of the cannon, being three times larger than typical NERF guns, immediately captures attention. What sets this creation apart is the extensive use of 3D-printed components, including the barrel, body assembly, and magazine. The loading mechanism further enhances the user experience by mimicking a bolt-action weapon but with a simplified process. Each round involves a cartridge containing flammable HHO gas produced through electrolysis, adding a unique and exciting element to the gameplay. This innovation not only showcases technical skills but also demonstrates a creative approach to customizing a familiar toy. Flasutie's cannon stands out as a testament to blending technology, DIY ethos, and imaginative design in the realm of foam dart weaponry.