Phalanx Close-in Ship Defense Guns getting Upgrades

The Mark 15 Phalanx ship defense weapon is capable of firing 3000 to 4000 20mm rounds-per-minute as a close-in anti-ship missile weapon. Defense Industry Daily reports that the upgraded version (1B) can also be used against gunboats, artillery, and helicopters.

Some of the customers for the Phalanx include:

• US Navy
• US Coast Guard
• Australia
• Israel
• New Zealand
• Japan
• United Kingdom
• Canada
• Taiwan
• Poland
• Bahrain
• Saudi Arabia

I don't think they're firing any of these at the Knob Creek Machine-Gun Shoot in Kentucky, though the crowds would be even bigger if they did.