WS20020 : 20mm Oerlikon Standard Ammo Box - 20 PCS, compatible with all 20mm Oerlikon kits. BUNKER Studio 1/200 USN Oerlikon 20mm Anti-Aircraft Gun Complete Upgrade Set. WS20010 : Single 20mm Oerlikon AA Gun (10 PCS) - Designed for WWII US Navy carriers: CV-5 Yorktown, CV-6 Enterprise, CV-8 Hornet.
