US Army Awards Raytheon RTX $441.6 Million Patriot GEM-T Contract Modification to Replenish Stocks Expended During Operation Epic Fury

Technical Summary

On 30 April 2026 the US Army Contracting Command, Redstone Arsenal, awarded Raytheon RTX, Andover, Massachusetts, a $441,600,000 firm-fixed-price contract modification for procurement of MIM-104 Patriot Guidance Enhanced Missile-Tactical (GEM-T) interceptors. The award was reported on 1 May 2026 by ClearanceJobs, Army Recognition and Defence Blog and was tied explicitly to replenishment of stocks expended during Operation Epic Fury, the US-Israeli combined air and missile campaign against the Islamic Republic of Iran initiated on 28 February 2026. Work will be performed in Andover, Massachusetts (Raytheon Integrated Air Defence Systems final integration) and Chambersburg, Pennsylvania (Letterkenny Munitions Center government integration and recertification), with FY2026 special funds fully obligated at award and a contract completion date of 30 September 2026.

The Patriot GEM-T is the third-generation digital-fuze upgrade of the original PAC-2 interceptor. It retains the PAC-2 airframe (5.31 m long, 410 mm body diameter, 914 kg launch mass) and the original Thiokol TX-486 single-stage solid rocket motor, but introduces a low-noise oscillator, a digital fuze, and an upgraded seeker low-noise front-end. These changes give the GEM-T improved performance against low-Radar-Cross-Section (low-RCS) targets, including subsonic cruise missiles and small unmanned aerial systems, while retaining the PAC-2 lineage’s effectiveness against Tactical Ballistic Missiles (TBMs) and high-performance aircraft. Engagement range is published at up to 160 km against aerodynamic targets, with intercept altitude up to 24,000 m (80,000 ft).

$441.6 million firm-fixed-price modification, FY2026 funds fully obligated at award, completion 30 September 2026 — the contract is explicitly tied to replenishment of GEM-T stocks expended in Operation Epic Fury, with implied delivery in approximately 50 to 80 missiles depending on the production-modification baseline. US Army Contracting Command Redstone Arsenal contract release, 30 April 2026

Analysis of Effects

The GEM-T warhead is a 91 kg (200 lb) blast-fragmentation device with pre-formed tungsten fragments dispersed by an HE filler. Open-source filler is consistent with PBXN-class (Plastic Bonded eXplosive, Navy series) compositions and historical Comp B (RDX/TNT 60/40) variants for older production lots; recent Raytheon GEM-T tranches are understood to use PBXN-110 / PBXN-9 chemistry to meet the Insensitive Munitions standard under STANAG 4439 and AOP-39. Initiation is by digital proximity fuze with a fragmentation pattern optimised for forward-throw against incoming TBM threats. The GEM-T is therefore a hit-to-kill-supplemented HE design; it differs fundamentally from the PAC-3 Cost Reduction Initiative (PAC-3 CRI) and PAC-3 Missile Segment Enhancement (PAC-3 MSE) variants, which are kinetic-kill hit-to-kill missiles with no HE warhead.

Net Explosive Quantity (NEQ) calculation for the all-up missile sums the warhead HE and the SRM propellant. The 91 kg HE warhead contributes approximately 91 kg TNT-equivalent. The TX-486 SRM propellant is published at approximately 700 kg of HTPB/AP composite (Hydroxyl-Terminated Polybutadiene binder with Ammonium Perchlorate oxidiser and aluminium fuel), with a TNT-equivalence factor of approximately 0.4–0.6 in confined-stack scenarios under STANAG 4123 / AASTP-1 modelling. The aggregate NEQ figure for storage Quantity-Distance (Q-D) computation is therefore in the range of approximately 350–500 kg per missile, with HD 1.1, Compatibility Group E (HD 1.1E) under STANAG 4123. The all-up missile is supported by separate reckonings for the launch canister, the storage container, and the disassembled-state transit configuration, each with its own HD/CG marking.

Operational status: GEM-T missiles have been combat-employed across Operation Epic Fury (28 February 2026 onwards), in the European NATO IADS posture continuously since 2014, and in the Saudi Arabian, UAE and Kuwaiti Patriot detachments engaging Houthi ballistic and cruise-missile threats during the Red Sea crisis (2023–2026). Cumulative GEM-T deliveries across the worldwide fleet are estimated at over 3,000 rounds since the original GEM-T production line opened in 2002. The production line is at Letterkenny Munitions Center for government depot integration and at Andover for prime contractor final assembly.

Personnel and Safety Considerations

For US Army Air and Missile Defence (AMD) battalion ammunition technicians, Patriot Crewmembers (MOS 14T), and Patriot Maintenance personnel (MOS 14H, 14E), the GEM-T missile is handled in its sealed canister at all times during normal field operations. The missile is not bare-handled outside the depot environment. Q-D distances under AASTP-1 / DoD 6055.09-M apply at the canister NEQ level, with Inhabited Building Distance (IBD) and Public Traffic Route Distance (PTRD) calculated from the stacked-pad NEQ summation. For Letterkenny depot operations, the applicable safety regime is the US Army Defense Ammunition Center (DAC) and the Defense Threat Reduction Agency (DTRA) explosive-safety inspection regime; the relevant doctrinal authority is the Department of Defense Explosives Safety Board (DDESB) Technical Paper 14 family.

For Insensitive Munitions compliance, the GEM-T has been subject to STANAG 4439 / AOP-39 Type-Test re-qualification under the Patriot Modernisation Program post-2018 production lots. Allied operators (Germany, the Netherlands, Spain, Greece, Sweden, Poland, Romania, Saudi Arabia, the United Arab Emirates, Kuwait, Israel, Japan, Republic of Korea, Taiwan and the United States) follow national IM acceptance regimes mapped to the AOP-39 framework. The GEM-T HE warhead remains a design pre-dating the full AOP-39 Type-Test integration, and certain export tranches are accepted under partner-nation national-deviation procedures rather than full STANAG 4439 compliance.

Data Gaps

DATA GAP: Quantity — the contract release does not state the number of GEM-T rounds covered by the $441.6m modification. Prior GEM-T unit prices in published Department of War contract data place the per-round price in the $5–9m band depending on lot size and content of canister/container/electronics, implying a quantity in the order of 50–80 missiles for this modification.

DATA GAP: Lot configuration — whether the modification covers new-build missiles, certified-used remanufacture, or a mix of both is not stated.

DATA GAP: Operation Epic Fury expenditure — the cumulative GEM-T expenditure during Operation Epic Fury has not been disclosed in open-source US Army or CENTCOM reporting.

DATA GAP: FMS partner offset — whether any portion of this modification is intended to backfill missiles transferred to allied operators (Germany, Israel, Saudi Arabia, UAE) rather than US Army stocks is not specified.

AI-assisted technical assessment based on open-source material. Not a formal intelligence product. Image attribution noted where applicable.