Exhibit 3.1

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

AEROJET ROCKETDYNE HOLDINGS, INC.

FIRST. The name of the corporation is Aerojet Rocketdyne Holdings, Inc. (the “Corporation”).

SECOND. The address of the Corporation’s registered office in the State of Delaware is 251 Little Falls Drive, City of Wilmington, County of New Castle 19808. The name of its registered agent at such address is Corporation Service Company.

THIRD. The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware, as amended (the “DGCL”).

FOURTH. The total number of shares that the Corporation shall have authority to issue is 1,000 shares of common stock, and the par value of each such share is $0.01.

FIFTH. The board of directors of the Corporation is expressly authorized to adopt, amend or repeal bylaws of the Corporation.

SIXTH. Elections of directors need not be by written ballot except and to the extent provided in the bylaws of the Corporation.

SEVENTH. To the fullest extent permitted by the DGCL, including, without limitation, as provided in Section 102(b)(7) of the DGCL, as the same exists or may hereafter be amended, a director or officer of the Corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director or officer. If the DGCL is amended after the effective date hereof to authorize corporate action further eliminating or limiting the personal liability of directors or officers, then the liability of a director or officer of the Corporation shall be eliminated or limited to the fullest extent permitted by the DGCL as so amended. Any repeal or modification of this Article SEVENTH by the stockholders of the Corporation shall not adversely affect any right or protection of a director or officer of the Corporation existing at the time of such repeal or modification or with respect to events occurring prior to such time.

EIGHTH (A) Each person who was or is made a party to, or is threatened to be made a party to, or is involved in any action, suit, or proceeding, whether civil, criminal, administrative, or investigative (hereinafter a “proceeding”), by reason of the fact that he or she is or was a director or officer of the Corporation or is or was serving at the request of the Corporation as a director, officer, employee, or agent of another corporation or of a partnership, joint venture, trust, or other enterprise, including service with respect to employee benefit plans, whether the basis of such proceeding is alleged action in an official capacity as such director, officer, employee, or agent, or in any other capacity while serving as such director, officer, employee, or agent, shall be indemnified and held harmless by the Corporation to the fullest extent permitted by the DGCL, as the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader indemnification rights than the DGCL permitted the Corporation to provide prior to such amendment), against all expense, liability, and loss (including attorneys’ fees, judgments, fines, other expenses and losses, amounts paid or to be paid in settlement, and excise taxes or penalties arising under the Employee Retirement Income Security Act of 1974) reasonably incurred or suffered by such person in connection therewith, and such indemnification shall continue as to a person who has ceased to be a director, officer, employee, or agent, and shall inure to the benefit of his or her heirs, executors, and administrators; provided, however, that, except as provided in paragraph (B) hereof, the Corporation shall indemnify any such person seeking indemnification in connection with a proceeding (or part thereof) initiated by such person only if such proceeding (or part thereof) was authorized by the Board. The right to indemnification conferred in this Article EIGHTH shall be a contract right and shall include the right of a director or officer to be paid by the Corporation the expenses (including attorneys’ fees) incurred in defending any such proceeding in advance of its final disposition; provided, however, that the payment of such expenses incurred by a director or officer in his or her capacity as a director or officer (and not in any other capacity in which service was or is rendered by such person while a director or officer including, without limitation, service to an employee benefit plan) in advance of the final disposition of a proceeding shall be made only upon delivery to the Corporation of an undertaking, which undertaking shall itself be sufficient without the need for further evaluation of any credit aspects of the undertaking or with respect to such advancement, by or on behalf of such director or officer, to repay all amounts so advanced if it shall ultimately be determined by a final, non-appealable order of a court of competent jurisdiction that such director or officer is not entitled to be indemnified under this Article EIGHTH or otherwise.

(B)    If a claim under paragraph (A) of this Article EIGHTH is not paid in full by the Corporation within sixty (60) days after a written claim, together with reasonable evidence as to the amount of such claim, has been received by the Corporation, except in the case of a claim for advancement of expenses (including attorneys’ fees), in which case the applicable period shall be twenty (20) days, the claimant may at any time thereafter bring suit against the Corporation to recover the unpaid amount of the claim, and, if successful in whole or in part, the claimant shall also be entitled to be paid the expense, including attorneys’ fees, of prosecuting such suit. It shall be a defense to any such suit, other than a suit brought to enforce a claim for expenses (including attorneys’ fees) incurred in defending any proceeding in advance of its final disposition where the required undertaking, if any is required, has been tendered to the Corporation, that the claimant has not met the standards of conduct that make it permissible under the DGCL for the Corporation to indemnify the claimant for the amount claimed, but the burden of proving such defense shall be on the Corporation. Neither the failure of the Corporation (including the Board or a committee thereof, independent legal counsel, or its stockholders) to have made a determination prior to the commencement of such suit that indemnification of the claimant is proper in the circumstances because he or she has met the applicable standard of conduct set forth in the DGCL, nor an actual determination by the Corporation (including the Board or a committee thereof, independent legal counsel, or its stockholders) that the claimant has not met such applicable standard of conduct, shall be a defense to the suit or create a presumption that the claimant has not met the applicable standard of conduct. In any suit brought by an indemnitee to enforce a right to indemnification or to advancement of expenses hereunder, or by the Corporation to recover an advancement of expenses pursuant to the terms of an undertaking, the burden of proving that the indemnitee is not entitled to such indemnification, or to such advancement of expenses, under this Article EIGHTH or otherwise shall be on the Corporation.

(C)    The right to indemnification and the payment of expenses incurred in defending a proceeding in advance of its final disposition conferred in this Article EIGHTH shall not be exclusive of any other right that any person may have or hereafter acquire under any statute, provision of the certificate of incorporation, bylaw, agreement, or vote of stockholders or disinterested directors, or otherwise.

(D)    The Corporation may maintain insurance, at its expense, to protect itself and any director, officer, employee, or agent of the Corporation or another corporation, partnership, joint venture, trust, or other enterprise against any such expense, liability, or loss, whether or not the Corporation would have the power to indemnify such person against such expense, liability, or loss under the DGCL.

(E)    In the case of a claim for indemnification or advancement of expenses against the Corporation under this Article EIGHTH arising out of acts, events, or circumstances for which the claimant, who was at the relevant time serving as a director, officer, employee, or agent of any other entity at the request of the Corporation, may be entitled to indemnification or advancement of expenses pursuant to such other entity’s certificate of incorporation, bylaws, or other governing document, or a contractual agreement between the claimant and such entity, the claimant seeking indemnification or advancement of expenses hereunder shall first seek indemnification or advancement of expenses pursuant to any such governing document or agreement. To the extent that amounts to be paid in indemnification or advancement to a claimant hereunder are paid by such other entity, the claimant’s right to indemnification and advancement of expenses hereunder shall be reduced.