The 20 mm Oerlikon naval gun became one of WWII’s most lethal close-range defenses, feared by low-flying aircraft for its reliability and brutal stopping power. During the early 1940s, one unit cost roughly $20,000 USD, making it affordable enough to be mounted in large numbers. Each round cost only a few dollars—cheap shots that often decided survival in seconds. ⚓🔥 🇺🇸 #20mmOerlikon #NavalWeapons #WWIINaval #MilitaryHistory #AntiAircraftGun | Navy Arsenal