Manufacturer catalog
Day & Zimmermann is a U.S. family-owned company whose defense work includes ammunition production, munitions services, government-owned facility operations, and related engineering support. Its munitions business produces mortar and artillery ammunition for the U.S. military and approved international customers, with public product sheets tying the company to 60 mm and 120 mm mortar-cartridge families represented in this catalog.
5 weaponsFounded in 1901 and headquartered in Philadelphia, Day & Zimmermann operates across construction and engineering, operations and maintenance, staffing, security, and defense. The company describes itself as a long-running Department of Defense partner and identifies munitions as a core line of work, including close-combat, direct-fire, indirect-fire, energetic, fuzing, safe-and-arm, ignition-safety, demilitarization, and coproduction capabilities.
The company's public munitions footprint includes American Ordnance LLC, which Day & Zimmermann says operates the Iowa Army Ammunition Plant and storage facilities at the Milan Army Ammunition Plant. In Kansas, Day & Zimmermann and the U.S. Army marked a new 155 mm M795 load-assemble-pack line at Parsons in 2026, adding large-caliber artillery capacity beside existing 60 mm and 81 mm mortar production lines.
Day & Zimmermann's 60 mm mortar-cartridge sheet identifies the M720A1, M720A2, and M768 as high-explosive cartridges for M224-series 60 mm mortar systems, with the M720A1 using an M734A1 multi-option fuze.
Sources: D&Z M720A1 M720A2 M768 product sheet
The same Day & Zimmermann family sheet distinguishes the M768 from the M720A1 by its M783 point-detonating fuze while retaining the 60 mm M224-series cartridge role.
Sources: D&Z M720A1 M720A2 M768 product sheet
Day & Zimmermann's 120 mm mortar-ammunition sheet identifies M933A1 and M934A1 high-explosive cartridges for M120 and M121 mortar systems, with the M933A1 using an M783 point-detonating fuze.
Sources: D&Z M933A1 M934A1 product sheetDay & Zimmermann lists 1901 as its founding year and describes the present company as a century-old, family-owned business serving corporate and government customers.
Sources: Day & Zimmermann company profile
Day & Zimmermann's history says the company acquired 100 percent of American Ordnance, previously a joint venture with General Dynamics, and notes American Ordnance operations at the Iowa and Milan Army ammunition plants.
Sources: Day & Zimmermann history
Day & Zimmermann and Rheinmetall launched Rheinmetall Day & Zimmermann Munitions to combine Rheinmetall ammunition design and development expertise with Day & Zimmermann manufacturing capability.
Sources: Day & Zimmermann history, Day & Zimmermann munitions
The U.S. Army and Day & Zimmermann opened a Parsons, Kansas load-assemble-pack facility dedicated to 155 mm M795 artillery projectiles, with Army reporting describing planned full operational capacity of 12,000 M795 projectiles per month.
Sources: DVIDS Parsons M795 facility, D&Z Parsons M795 production line
Public Day & Zimmermann munitions sources sometimes identify product and facility work through the parent company, American Ordnance LLC, Day & Zimmermann Kansas, or Rheinmetall Day & Zimmermann Munitions. Day & Zimmermann identifies American Ordnance as its Iowa Army Ammunition Plant operating unit and records the 1999 Mason & Hanger acquisition in company history. Weapon records retain the more specific public attribution where source wording supports it.
Category
Tube artillery, rocket artillery, and long-range ground fires.
Category
Standalone missiles, bombs, rockets, torpedoes, and guided or unguided explosive payloads.
