ČZW-438The ČZW-438 is a personal defense weapon designed by Czech Weapons, aiming at increasing range and armor penetration.DesignThe ČZW-438 is chambered in 4.38×30mm Libra which was also developed by ČZW. The stock can be folded and the gun comes with a flash suppressor attached.ČZW-438 M9ČZW offered a version chambered in 9x19mm Parabellum called ČZW-438 M9,it is not advertised with an effective range of 200 meters and body armor penetration and has slightly lower fire rate. ČZW claims a 95% parts commonality with the original.