The former chief operating officer of a New Jersey custom manufacturing firm admitted today that he made false statements and submitted false documents to the Department of Defense in fulfillment of a machine gun bipod assembly contract, U.S. Attorney Craig Carpenito announced. Mark Colello, 54, of Hackettstown, New Jersey, pleaded guilty before U.S. District Judge William Martini in Newark federal court to an information charging him with two counts of making false statements and representations.