Abstract: This paper reports on studies into the effect of casing material on the fragment spatial distribution of a Fragment Generator Warhead (FGW). Usually, metals are used for the manufacture of the warhead casing which is manufactured using conventional methods. Recently, FGWs have been designed with complex contours to meet the specific requirements of interceptor missiles. Manufacturing of such casings using conventional methods has been observed to be difficult and time consuming. Alternatively, the casings can be manufactured with ease by rapid prototyping (RP) methods using non-metallic materials. In order to study the effect of metallic and non-metallic materials, the authors conducted a comparative performance analysis of aluminium and Dura Form Glass Filled (DFGF) warheads manufactured by conventional and RP methods, respectively. The warheads are designed to yield a fragment beam of 32° in azimuth and 20° in elevation. The experimental details are presented and it is concluded that uniform fragment spray is only yielded from the metallic casings manufactured by conventional methods.