The weather shield of a naval gun weapon system is an element of fundamental importance in the operational life of the gun, since it guarantees a defense from the environment (i.e. thermal effects, rain, corrosion, green water load, etc.) in the operational conditions (i.e. protection against electromagnetic interferences, RCS reduction, etc.). This thesis concerns the design, the construction of a prototype, the qualification, and the industrialization of a weather shield for naval gun system MK 71 MOD 2. The aim of the thesis is to make the student acquire a working method in the design through participation in all phases of product development including not only the aspects of calculation and drawing, but also the economic aspects (budgeting, production costs, etc..), safety, ergonomics, logistics, workshop and even after sales.