How to bid on 155mm MACE for the Department of the Army

What the Army is buying

The Department of the Army is seeking proposals for a 155mm modular artillery prototype project called Modular Artillery for Combat Effectiveness (MACE). This is an RFP for vendors able to propose work suited to the project’s technical and schedule requirements.

The latest amendment extends the response deadline and replaces earlier solicitation attachments. It also updates the questions and answers, Statement of Work, and CLIN Matrix.

Key dates and the deadline

The solicitation was published October 27, 2026. Proposals are due November 30, 2026, at 3:00 p.m. ET. The anticipated award date is March 29, 2027.

The November 30 deadline replaces the earlier October 30 deadline. The solicitation says to use the timelines, relative durations, and CLIN structures in the amended documents as the definitive basis for the technical, schedule, and cost/price volumes.

Who this opportunity may suit

This opportunity may suit firms capable of proposing a 155mm modular artillery prototype project and preparing technical, schedule, and cost/price proposal volumes. Review the solicitation and its revised attachments to determine whether your firm can address the stated work and requirements.

How to access the solicitation

Open the opportunity through the portal’s “View original source” control. If the first click opens the portal homepage, click again to go to the bid. A free account may be needed to view documents.

Technical data and drawings require contracting approval and signed access documents. The solicitation says vendors approved for the technical data package can access the added documents, while others may request access through SAM.gov.

Prepare your proposal using the current documents

Use the latest revised attachments rather than older versions. In particular, check the updated questions and answers, Statement of Work, and CLIN Matrix, and confirm that your technical, schedule, and cost/price volumes follow their timelines, relative durations, and CLIN structure.

Build in time to review the technical clarifications, confirm any required approvals and signed access documents, and check that the proposal is complete and consistent across volumes before the November 30 deadline.