After multiple rounds of testing and iterative printing over a period of two weeks, the final version of the BB gun has finally been completed.

Here comes the fun and engaging BB gun—unbox it and enjoy!

Required accessories: small rubber bands about 2 cm in diameter. (Alternatively, you can use yellow rubber bands purchased from a 2-yuan store and cut them to size.)

Cut 2–3 mm of 1.75 mm filament (no need to cut the yellow rubber bands; simply tie a knot at the slot where the clip will be placed), as shown in the figure below.

Printing precautions:

1. Before printing with filament, make sure it is completely dry to ensure the toy’s mechanical functions operate properly.

2. After printing is complete, allow the heated bed to cool down before removing the print to prevent deformation and maintain a pleasant tactile experience.

3. Immediately after removing the model, you may need to apply some force to gently pry apart certain areas, as this could be due to printer tolerances or filament issues.

4. If the model shrinks excessively, sanding will be necessary.

Assembly video