155mm XM1128 Artillery Metal Parts Assembly

The Department of the Army Acquisition Support Center PEO Ammunition established a Master IDIQ on April 13, 2023, for production and delivery of 155mm XM1128 Artillery Metal Parts Assemblies—hollow projectiles and base closures in high-fragmentation steel—with ordering authority extending through April 12, 2028, leaving approximately 1 year 8 months of remaining window. The vehicle is unrestricted and carries a combined potential value of $417.9 million, of which 100 percent has already been obligated across seven task orders.

Competition is tightly concentrated. General Dynamics Ordnance And Tactical Systems Inc. holds four orders valued at $211.4 million combined potential, while IMT Defense Corp holds three orders valued at $206.5 million combined potential—a near-equal split of both order count and dollar value. No other primes appear on the vehicle.

Ordering momentum has been front-loaded. Four task orders awarded in the first month after vehicle establishment (April–August 2023) consumed approximately $313.2 million in potential value, including two Ukraine-aid orders totaling $268.7 million. Thereafter, activity declined to one order in 2024 and two in 2025, with the most recent award on August 26, 2025. This backloading of obligation within an already-mature vehicle suggests the peak procurement window has passed.

Customer concentration is high. Department of the Army Acquisition Support Center PEO Ammunition is the primary customer, funding five orders worth $373.4 million combined potential (89 percent of vehicle value). The broader Department of the Army placed two orders worth $44.5 million combined potential (11 percent).

All seven task orders are unrestricted, competitively awarded. Pricing is fixed-price with economic price adjustment across all orders except the two first-article-test orders, which are firm fixed price. Recent orders (August 2025) range from $33.5 million to $57.8 million with delivery windows of three to four years. The Ukraine conflict has been explicit in order descriptions—multiple orders cite support for that conflict alongside Army stockpile replenishment, though Ukraine-specific orders closed in August 2024 and subsequent awards returned to domestic Army demand.

With all potential value obligated and 1 year 8 months remaining in the ordering window, new prime awards are unlikely unless the Army exercises additional option periods or the vehicle authority is formally extended. Existing primes dominate entirely; entry as a subcontractor to General Dynamics or IMT Defense remains the practical path forward.

The 155mm XM1128 Artillery Metal Parts Assembly consist of a hollow Projectile Metal Parts Assembly and Base Closure. Both do not contain energetic fill. The Projectile Metal Parts Assembly is made from high fragmentation steel alloy, HF-1, which has a finished weight of approximately 70.5 pounds, is approximately 28.2 inches long, and has a curved exterior. In addition, the Projectile Metal Parts Assembly utilizes a welded rotating band that encircles the projectile body close to the base. The Base Closure is made from 4340 steel, has a finished weight of approximately 6.4 pounds and is approximately 3 inches long with a diameter of approximately 6 inches. For storage and transport of the Projectile Metal Parts Assembly, a Lifting Plug is threaded into the nose cavity, a Base Thread Protector with O-ring is installed with a desiccant bag inside, a flexible cover is installed over the rotating band, and eight metal parts assemblies are placed on a wood pallet. For the storage and transport of the Base Closure, the base closure is placed in a Vapor Corrosion Inhibitor (VCI) bag and shipped in a fiberboard container on a pallet. The provided Government Furnished Material (GFM) for the 155mm XM1128 Artillery Metal Parts Assembly will consist of the Plug, Lifting, M107 and M804 (Drawing 13015329) once available.