USS Cassin Young DD-793 - 40mm Anti-Aircraft Guns
Range:
Surface(42°): 6mi / 10km
Altitude(90°): 13mi / 21km / 22,000 feet
Projectile Weight: 2lbs
Rate of fire:
160rds/min(2.6per/sec) x 4 barrels=640rds/min(11rd/sec) x 2 barrels=320rds/min(5rd/sec)
Muzzle Velocity: 2890ft/sec
WW2 Configuration: 5 twin mounts
1950's Configuration: 1 twin Mount and 2 quad mounts