Battlestar Galactica Viper Mk VII (Apollo call sign)The Viper MK VII was the modern design of fighter that was in service when the Cylons launched their attack on the 12 Colonies. It had the same basic layout as earlier models of Viper but its computer systems were vulnerable to Cylon attack. After they escaped, both the Galactica and Pegasus produced versions without the vulnerable computer systems. The Eaglemoss model measures slightly over 10. 5 inches (27 cm) long.