Day & Zimmermann Lone Star LLC

Day & Zimmermann Lone Star LLC is a for-profit limited liability company and subsidiary of Day & Zimmermann headquartered in Texarkana, Texas, operating as the Camden Operations Division. The firm specializes in the manufacture of munitions components and ammunition-related products for the Department of Defense. Registered in SAM.gov since September 28, 2010, the company serves as a critical supplier to multiple military branches and federal agencies through extensive prime and subcontractor relationships, leveraging its specialized manufacturing capabilities and established production infrastructure to support the U.S. armed forces' ammunition stockpile requirements and operational readiness objectives.

Day & Zimmermann Lone Star LLC has demonstrated extensive expertise across a diverse portfolio of munitions manufacturing through its federal contract awards. The company's primary products include M67 fragmentation hand grenades, percussion primers (M28B2 and M82/M82A1 variants), military fuzes (M201A1, M213, M228, and M208 smoke pot fuzes), MK4-3 signal cartridges, 155mm combustible cartridge cases for the MACS (Munitions Ammunition Cartridge System), and 120mm M830A1 ammunition recapitalization services. The Department of the Army, specifically through the Program Executive Office (PEO) Ammunition, has been the primary federal funding agency, awarding the majority of delivery orders without set-aside designations. Additional awards have come from the Naval Sea Systems Command and the Office of the Secretary of Defense. Recent notable prime contract awards include a $10.2 million delivery order for 336,210 M67 fragmentation grenades (September 2025), a $30.9 million order for M82A1 percussion primers (July 2025), a $270,940 order for MK4-3 signal cartridges in support of Foreign Military Sales (September 2025), and a $2.33 million order for M28B2 percussion primers (July 2025). The company has also served as a subcontractor to prime defense contractors including General Dynamics Ordnance and Tactical Systems, Inc., Northrop Grumman Systems Corporation, Alliant Techsystems Operations LLC, and American Ordnance LLC, providing specialized components such as electric primers and facility upgrades. All awards have been firm fixed-price contracts with no small business set-asides applied.

Day & Zimmermann Lone Star LLC maintains five active indefinite delivery contracts with the federal government, all awarded by the Program Executive Office Ammunition with single-award designations and no set-aside provisions. The largest IDV, valued at $966.7 million with an ultimate completion date of September 27, 2028, covers the manufacture and delivery of 155mm MACS M231/M232-series combustible cartridge cases, with a $238 million delivery order already issued to support Ukraine production requirements. A $311 million IDV awarded July 28, 2021 (expiring August 17, 2026, though this date appears to have been extended based on recent delivery orders) consolidates grenade and fuze manufacturing for multiple munitions components including M67 fragmentation grenades, M201A1 and M213 hand grenade fuzes, M228 grenades, M208 smoke pot fuzes, and experimental variants (XM111 and XM112). This contract has generated approximately $65.2 million in executed delivery orders as of the award history provided. A $40.3 million IDV covering 120mm M830A1 ammunition recapitalization, awarded June 23, 2023 with completion targeted for July 31, 2028, encompasses disassembly, component replacement, and refurbishment services. Two additional IDVs support the percussion primer portfolio: a $32.3 million contract for M28B2 percussion primers (awarded September 28, 2023, expiring September 30, 2028) and an $8.68 million contract for MK4-3 signal cartridges (awarded November 19, 2021, expiring October 31, 2027). These IDVs establish the company as the sole-source provider for critical munitions components, enabling the Program Executive Office Ammunition to issue task and delivery orders on an as-needed basis to meet evolving Department of Defense munitions production demands across multiple fiscal years and military service branches.