The US Military GAU 23 30 Cal Auto cannon makes a great terrorist killer and will serve the US Military well in future battles. The Mk44 Bushmaster II is a 30 mm .br Another great weapon for the US military and us army. Could prove useful in combating terrorists in Iraq and Syria. The GECAL 50, officially designated by the .br TERRORIST KILLER us military GAU 19B 50 Cal Gatling Gun The US Military GAU 23 30 Cal Auto cannon makes a great terrorist killer and will serve the US .