A construction model for printing on a 3d printer. Fixing and assembling of the elements takes place with the help of screws M3x15, nuts M3, screws M2.5x10 and glue. It has three types of semi-axes, for leg segments and mounting the tower cover, for a rotary tower, for attaching the legs to the base. The shortest ones differ in length for the leg segments and the lid, the average one for fixing the legs to the platform, the longest one for the rotary tower. The foot pads, the muzzle brake (has a guide) and the cover plate of the tower are fixed with glue. The semi-axes of the same length are connected to each other by M3x15 screws and form an axis. After printing, a small adjustment of all the parts may be required. The overlays are highlighted in blue. To understand the assembly, several images have been uploaded. It is recommended to start assembling the model from the feet.