SKULL-1 holds 7 of the special 50 calibre rounds for each magazine. It is a light-weight pistol and possesses a fast reload time and has two firing modes; semi-auto and full-auto fire. In the semi-auto fire mode, it possesses a higher accuracy and more damage. In the full-auto fire mode, it possesses a higher rate of firing. The special bullet developed by the government can give critical damage to zombie with its high penetration rate.