Exhibit 3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION
OF
ORBITAL ATK, INC.

FIRST: The name of the corporation (hereinafter called the “Corporation”) is Orbital ATK, Inc.

SECOND: The address of the Corporation’s registered office in the State of Delaware is 1209 Orange Street, New Castle County, Wilmington, Delaware 19801. The name of the Corporation’s registered agent at such address is The Corporation Trust Company.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the Delaware General Corporation Law.

FOURTH: The total number of shares of stock which the Corporation is authorized to issue is 100 shares of common stock, having a par value of $0.01 per share.

FIFTH: The business and affairs of the Corporation shall be managed by or under the direction of the board of directors of the Corporation (the “Board of Directors”), and the directors need not be elected by ballot unless required by the bylaws of the Corporation (the “Bylaws”).

SIXTH: In furtherance and not in limitation of the powers conferred by the laws of the State of Delaware, the Board of Directors is expressly authorized to adopt, amend and repeal the Bylaws.

SEVENTH: No director shall be personally liable to the Corporation or its stockholders for monetary damages for any breach of fiduciary duty by such director as a director. Notwithstanding the foregoing sentence, this provision shall not eliminate or limit the liability of a director to the extent provided by applicable law (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the Delaware General Corporation Law or (iv) for any transaction from which the director derived an improper personal benefit. No amendment to or repeal of these provisions shall apply to or have any effect on the liability or alleged liability of any director of the Corporation for or with respect to any acts or omissions of such director occurring prior to such amendment or repeal.

EIGHTH: The Corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation in the manner from time to time prescribed by the laws of the State of Delaware. All rights herein conferred are granted subject to this reservation.