Lake City: The Missouri Plant That Feeds America's Rifles

Two letters on a cartridge head

Turn over a spent 5.56 case from almost any American range and there is a fair chance you will see it: LC, followed by two digits for the year. Those two letters stand for Lake City, a factory on the eastern edge of the Kansas City metro that most shooters will never see and almost all of them have fed through a rifle.

Lake City is not a brand. It is a place, owned by the US Army, run by a private contractor, sprawling across nearly four thousand acres of Missouri. It has been turning out military cartridges almost without pause since 1941. And in the last decade and a half, its name has become one of the most recognizable labels in civilian bulk ammo.

This is the story of how that happened.

1940: an arsenal before the war

In December 1940, a year before Pearl Harbor, the US government established the Lake City Arsenal in what is now northeastern Independence, Missouri. Production began in 1941. Remington Arms built the plant and ran it, with help from DuPont, and it became the first of 12 small-arms plants operated for the Army during the war.

That timing tells you a lot. The United States was not yet fighting, but it was preparing to supply an army many times larger than it had. Rifle cartridges were going to be needed by the billion, and peacetime factories could not make them fast enough. Lake City was one answer, built in the middle of the country.

The plant has operated continuously since 1941, with one exception: a five-year period after the Second World War. Then it came back, and it has not stopped since.

A government plant with a private crew

Lake City is a government-owned, contractor-operated facility, usually shortened to GOCO. The Army owns the land, buildings and machinery. A company runs the production lines under contract. Today it falls under the Army's Joint Munitions Command.

That arrangement means the name on the operating contract has changed several times, even though the plant itself never moved:

Sources differ slightly on when ATK took over, with Wikipedia saying April 2000 and Shooting Illustrated saying 2001. American Rifleman reported that Winchester took full control effective October 1, 2020, after the Army selected it in September 2019, under a contract of seven years with an option for three more. It was a homecoming of sorts: Winchester had run Lake City once before, from 1985 to 2000.

What happens inside

The scale is hard to picture. The plant covers about 3,935 acres and includes 375 buildings, 80 magazines, 25 warehouses and 14 igloos. It makes small-caliber ammunition in 5.56mm, 7.62mm, .50 BMG and 20mm, along with cartridges, percussion and electric primers and pyrotechnics.

It is not only a factory. Lake City also runs reliability testing for 5.56x45, 7.62x51, 9mm, .45 ACP and .50 BMG, serves as a NATO National and Regional Test Center, and demilitarizes and disposes of small-caliber ammunition and explosives.

How much does it make? The numbers depend on the source and the year:

• Nearly 1.4 billion rounds a year as of July 2007, per Wikipedia; American Rifleman used the same "nearly 1.4 billion" figure as a yearly average in 2020.
• A requirement since the late 2000s to maintain capacity for 1.6 billion rifle rounds a year.
• More than 17 billion rounds for the US military between 2000 and 2018.
• Nearly 2 billion cartridges annually, according to Shooting Illustrated in 2020, which also put the workforce at about 2,000 people, mostly civilians.

Whichever figure you use, it is the single largest producer of small-arms ammunition for the US armed forces.

The costs: an explosion and a Superfund listing

A plant that handles primers and propellant by the ton carries real risk. In April 2017, an accidental explosion at a primer manufacturing building killed one worker and injured four others.

There is also an environmental legacy. For decades, waste was treated and disposed of on site in unlined lagoons, landfills and burn pits. Contaminants included solvents, oils, explosives, perchlorates and heavy metals. The EPA placed Lake City on the National Priorities List in 1987, and it remains a Superfund site.

These are not footnotes. They are part of what it means to manufacture ammunition at the scale a modern military demands.

How "Lake City" ended up on civilian cases

For most of its history, Lake City's output went to the military. That changed in the 2010s. According to Wikipedia, commercial sales since 2011 have run to hundreds of millions of rounds a year. A further claim, that by 2023 commercial sales often outstripped military production by two to one, is flagged on Wikipedia as needing a citation, so treat it with caution.

For bulk buyers, the result is visible on any retailer's 5.56 page. Ammunition Depot lists several Winchester products carrying the Lake City name, including a Winchester Lake City 5.56 55-grain M193 FMJ case of 1,000 rounds in 20-round boxes, new brass and Boxer primed, listed at 3,180 fps, plus can bundles and an M855 unpainted-tip version.

Our existing Lake City M193 case review covers that product as a purchase. This piece is about the plant behind the name.

Four things people get wrong about Lake City

"Lake City is a brand." It is a government factory. The brand on the box is whoever holds the operating contract, which today is Winchester. Before 2020, Lake City-made ammunition reached civilians under other operators' names.

"Lake City makes all of America's military ammo." It is the largest single producer of small-arms ammunition for the US armed forces, but not the only one. American Rifleman noted in 2020 that Winchester was already the military's largest small-caliber supplier outside Lake City before it took over the plant. Combining the two made Olin Winchester the largest supplier of military small-arms ammunition in the country.

"Every round labeled Lake City is military-spec." Retail listings use the name, but they do not always say where a lot was loaded or which specification it meets. Some are described as military-spec on the listing; many simply say target or practice. Read what the listing actually claims.

"Lake City only makes rifle ammunition." Its production list includes .50 BMG and 20mm, plus primers and pyrotechnics, and its testing work covers 9mm and .45 ACP as well as rifle cartridges.

Why it matters when the shelves go empty

A plant like Lake City is one reason civilian 5.56 can feel abundant in calm years and vanish in a panic. When military demand rises, or when allied countries need ammunition, a contractor-operated plant's first obligation is to its government customer. Commercial sales are what is left over. That dynamic is part of the broader story told in our ammo shortage history.

For a bulk buyer, the takeaway is practical: when Lake City-labeled 5.56 is available and the delivered cost per round fits your budget, that is often a sensible moment to restock, rather than waiting until demand spikes. Browse current options in the bulk .223/5.56 category.

The plant behind the headstamp

Most of the brass you sweep off a range floor tells you nothing about where it came from. LC cases are different. They point to a specific place, built in a hurry in 1940, run by a rotating cast of contractors, scarred by an explosion and a cleanup, and still turning out cartridges at a pace measured in billions.

The next time a case of Lake City lands on your porch, it is worth remembering that the two letters on each head are an address.

Editorial note: This is an independent editorial overview built from manufacturer specifications, retailer listings and published sources. We have not performed hands-on testing of the products discussed, and nothing here is a performance guarantee. Verify specifications, compatibility and the law where you live.

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