Rocket powered by CO2 cannister 3D print model

This is a 3 part rocket I designed made to hold a CO2 cannister, all the outside materials it needs is a 20 mm screw that is put into the indented whole underneath the launcher.

the rocket is 190 mm tall, the base is 120 mm.

The head of the rocket is hollow, this is purosely done so to fill with weights to allow the rocket to fly straight into the air.