Amron, a division of AMTEC Corporation, is a world leader in the production of medium caliber ammunition cartridge cases (20mm, 25mm, 30mm and 40mm), and is the sole producer of these cartridge cases for the US Department of Defense. Amron performs all required processes (cut, impact extrude, draw, machine, heat treat and anodize or paint) in-house to manufacture cartridge cases from metal bar stock (brass, aluminum and steel).

Amron also produces various metal parts in support of ammunition products, including grenade bodies embossed using a Fenn Mill.

Located in Antigo, Wisconsin, Amron provides modern facilities and equipment, highly qualified personnel, and substantial financial resources to ensure high quality, reliable products delivered on-time. Amron is also a certified small business under NAICS 332993 (Ammunition Manufacturing, except small arms), and our quality system is certified to ISO 9001:2015.

Metal Forming & Plating

Amron has been producing cartridge cases and munition components for the US Department of Defense since 1954, and operates in a 235,000 square foot manufacturing facility. Amron is the only manufacturer of medium caliber cartridge cases in the US that performs all manufacturing processes under one roof.

Manufacturing Processes: Amron receives raw material into its facility (Brass, Aluminum and Steel) from approved vendors. Manufacturing processes include Cold Forming, Annealing, Machining, Heat Treating and Finishing. Modern equipment includes two anodizers, two paint systems, one zinc plating line, and one phoscoat line. Machining is done on state-of-the-art equipment designed for machining all types and shapes of metal stock.

Personnel: Experienced workforce that includes design and manufacturing engineering, quality engineering, finance, contracts, human resources, procurement, and production operations.

Environmental Compliance: Amron’s facility, equipment and procedures are fully compliant with all federal, state and local requirements.

Cartridge Cases

20mm M103 Brass Cartridge Case

Used in gun systems for:
• F-15 Fighter Aircraft
• F-16 Jet Fighter Aircraft
• F/A-18 Fighter Jet
• Various Helicopters
• Phalanx Close-In Weapon System (CIWS)

Cartridge Rate of Fire:
• Phalanx CIWS: 4,500 rounds/minute
• M61 Vulcan Gun: 7,200 rounds/minute

25mm M910 Steel Cartridge Case

Used in Gun systems for:
• M2/M3 Bradley Fighting Vehicle
• Harrier Jet Aircraft
• AC-130 Gunship Aircraft

Production Capacity: 414,000 cases/month

Cartridge Rate of Fire:
• Bradley Fighting Vehicle: 180 – 200 rounds/minute
• Harrier Jet Aircraft: 4,200 rounds/minute

30mm Cases

30mm LW 30 Aluminum Cartridge Case

Used in gun systems for:
• Apache Helicopter
• MH-60L Direct Action Penetrator (DAP) Helicopter

Production Capacity: 300,000 cases/month
Cartridge Rate of Fire: • 625 rounds/minute

30mm GAU-8 Aluminum Cartridge Case

Used in gun systems for:
• A-10 Thunderbolt II Close Combat Gunship (Warthog)
• LPD-17 Naval Vessel
• CH-60 Helicopter
• AC-130 Gunship

Production Capacity: 576,000 cases/month
Cartridge Rate of Fire: • A-10 Warthog: 4,000 rounds/minute

40mm M169/M430A1 Aluminum Cartridge Case

Used in gun systems for:
• MK 19 High-Velocity Grenade Launcher
• MH-60L Direct Action Penetrator (DAP) Helicopter

Production Capacity:
• M169 Cartridge Case 1,200,000 cases/month
• M430A1 Grenade Bodies 200,000 units/month
Cartridge Rate of Fire: • 375 rounds/minute (1,500 yard range)

40mm M118/M195 Aluminum Cartridge Case

Used in gun systems for:
• M203 Low-Velocity Grenade Launcher

Production Capacity: 100,000 cases/month
Cartridge Rate of Fire: • 5 – 7 rounds/minute (160 yard range)

M430A1 Greneade Projectile Body

Contact Information

A National Defense Corporation
920 Amron Dr.
Antigo, WI 54409
(715) 623-4176


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