[Vik Olliver] adds a bit more power to what has traditionally been a store-bought toy by designing this printable dart gun ... own 3D printer don’t fret. You can always give this Nerf dart ...

[Flasutie] took it a step further by engineering a 3D-printed howitzer that doesn’t just sit pretty—it launches shells with a hydrogen-powered bang. The howitzer itself is like something out ...