DULLES, Va.--(BUSINESS WIRE)--Orbital ATK, Inc. (NYSE: OA), a global leader in aerospace and defense technologies, announced today that the U.S. Army's Precision Guidance Kit (PGK) for 155mm artillery achieved another major program milestone, having successfully completed its first production Lot Acceptance Test, demonstrating a median accuracy of less than 10 meters and passing all safety and reliability requirements. “Extensive, rigorous testing continues to prove the maturity of PGK technolo