1.6 Billion Rounds Of Ammo For Homeland Security? It’s Time For A National Conversation – ForbesArmored Personnel Carriers in Baghdad. (Photo credit: Wikipedia) The Denver Post, on February 15 th, ran an Associated Press article entitled Homeland Security aims to buy 1.6b rounds of ammo , so far to little notice. It confirmed that the Department of Homeland Security has issued an open purchase order for 1.6 billion rounds of ammunition.