The U.S. Army has made an urgent purchase of a specific type of 30mm cannon shells on behalf of U.S. Special Operations Command. Without the ammunition, the service said the U.S. Air Force’s AC-130W Stinger II gunships would be forced to use alternative rounds that would be unacceptably inaccurate and dangerously unreliable. In June 2017, the Army approved a plan to purchase up to 200,000 PGU-46/B 30mm cannon rounds from Orbital ATK. The service did not publicly disclose the total potential dollar value of the contract, but had to issue a so-called justification and approval document to explain why they...