This is working 3D printed Starship Model Rocket! It will fit; A. B, or C rocket engines but I have found C6-3’s work the best due to its size and weight.

There are two versions of the body, one with standard fins and one with flared fins. Since there are only two fins the flight is not perfectly stable, the flared fined version causes the rocket to spin increasing its stability.

For a stable flight, the nose cone needs to be weighted. If you pause the print at 28mm heigh, there is a cavity in the nose cone which will allow you to insert 8 pennies for weight. Then, continue with the print to enclose the pennies in the nosecone. The cone and the body do not require supports as long as your printer is able to bridge.

Flight test: https://youtu.be/RihZ0upY2Mg

If you are looking for silver filament, here is a affiliate link to the filament I used. https://amzn.to/3kkXaVu