In this final paper, the development of tank cannons up to the 2A46 cannon used by the Croatian Army on its M-84 (M-84A) tank is briefly presented through historical development. Furthermore, it is explained how the cannon is assembled or mounted after the parts have left the factory. This is explained in such a way, that each part is first described and analyzed in detail using models made in SolidWorks. After all the parts have been detaily clarified, the reader is able to understand the process of firing the cannon at the end of the read work based on the detailed description of the parts mentioned earlier. In addition to the written part of this final paper, an animation of the cannon firing process is put in place to help apprehend the operation of not only 2A46 cannon, but generally of all tank cannons, more easily and thoroughly.