(Editor's Note: This story has been updated to reflect new information from an Army official.) General Dynamics Land Systems, seizing on a recent Army request for up-gunned Strykers in Europe, is pitching a plan on Capitol Hill that would have lawmakers provide the service with an additional $412 million in fiscal year 2016 to outfit 81 Strykers with 30mm guns, according to officials and documents. Lobbyists for GDLS are telling congressional defense committees the company could meet the Army's...