According to a House investigation set to be presented on Capitol Hill on Wednesday, the leading manufacturers of assault rifles used in the deadliest mass shootings in the United States have collected more than $1 billion in revenue over the last decade as gun violence has risen across the country.

The findings, which were released ahead of a congressional hearing on the marketing of assault rifles on Wednesday, show that the gun industry has thrived by selling and marketing military-grade weapons to civilians, specifically targeting and exploiting the insecurities of young men, while some have made thinly veiled references to white supremacist groups.

After a gun massacre in Uvalde, Texas, that killed 19 elementary school students and two teachers, and a racially motivated mass shooting in a Buffalo supermarket that killed ten people, the House Committee on Oversight and Reform launched an investigation into the gun manufacturing industry in May.

The panel asked the top five gun manufacturers in the country to share information about their sales and marketing strategies, as well as any efforts they make to track safety data related to their products.

“The business practices of these gun manufacturers are deeply disturbing, exploitative, and reckless,” said Representative Carolyn B. Maloney, a Democrat from New York and the committee’s chairwoman. “These businesses employ aggressive marketing tactics to reach out to young people, particularly young men, and some even invoke symbols of white supremacy.”

“We discovered that none of these companies bother to keep track of the death and destruction caused by their products,” she added.

For the first time since 1994, the House is expected to vote on an assault weapons ban on Friday, a measure that will have no chance of passing in the evenly divided Senate.

The committee will hear testimony from Christopher Killoy, president and CEO of Sturm, Ruger & Company, and Marty Daniel, CEO of Daniel Defense, on Wednesday.

According to the report, the manufacturers investigated — Bushmaster, Daniel Defense, Sig Sauer, Smith & Wesson, and Sturm, Ruger & Company — all marketed their weapons to young men as a way to “prove their manliness,” and sold “guns to mass shooters on credit” while failing to take basic steps to monitor deaths associated with their products.

According to the report, while the country has struggled to deal with an epidemic of gun violence that has afflicted schools, churches, supermarkets, concerts, and shopping malls, firearms manufacturers have profited handsomely from the sale of the weapons used in mass shootings.

According to the report, Daniel Defense’s revenue from AR-15-style rifles tripled from 2019 to 2021, rising from $40 million to more than $120 million. The AR-15-style rifle used by the 18-year-old gunman in Uvalde was manufactured by Daniel Defense.

Ruger, the country’s largest rifle manufacturer, reported that its gross earnings from AR-15-style rifles nearly tripled between 2019 and 2021, rising to more than $103 million from $39 million. Mass shooters used the company’s AR-15-style rifle and pistols in Sutherland Springs, Texas, in 2017 and Boulder, Colorado, in 2021.

Between 2019 and 2021, Smith & Wesson’s revenue from all long guns, including AR-15-style rifles, more than doubled to $253 million, up from $108 million. In 2018, the company sold the weapon used in the July 4 massacre in Highland Park, Illinois, as well as the Parkland, Florida, school shooting.

Sig Sauer, the company that sold the AR-15-style rifle used in the Pulse nightclub shooting in Orlando, Fla., in 2016 and three of the weapons used by the gunman in Las Vegas in 2017, refused to reveal its revenue.

And Bushmaster, which manufactured the weapon used in the 2012 Sandy Hook Elementary School shooting in Newtown, Conn., said it had no financial data from previous years because it had recently been purchased by a new company.

According to the report, the gun manufacturers have made covert references to white supremacist groups such as the Boogaloo Bois as their business has grown.

The Boogaloo movement is an anti-government extremist group that believes a race war, or a second Civil War, is on the horizon. Members of the group often dress in Hawaiian-style floral print shirts and military fatigues. The Palmetto State Armory, a firearms company, markets a “Big Igloo Aloha” AK-47-style assault rifle adorned with such a floral print, which the report said was a clear reference to the Boogaloo Movement.