3D Model "Designer Cannon"

I create a series of prefabricated 3D printed constructors. The goal of the project is the development of 3D printing for educational purposes. The model is modeled in the Fusion 360 program.
The printing material is white PLA. The reason for choosing the material is simple:

- low shrinkage. And since the elements of the designer should fit together without fitting, shrinkage is the most important factor.
- Excellent adhesion. Since the gun itself is printed standing upright, a good adhesio