A personal injury law firm is now suing the producer of bump stocks — devices that can be fitted to a semi-automatic weapon to simulate fully-automatic fire — over its reported role in the Las Vegas shooting.

The lawsuit was filed Friday on behalf of concert-goers at the Route 91 Harvest music festival and does not purport to represent the 58 who were killed or the hundreds of others who were injured, the Wall Street Journal reported Tuesday.

Police said that at least two of the weapons in Stephen Paddock’s hotel suite were fitted with bump stocks. The firm, the Brady Center to Prevent Gun Violence, specifically targets a Texas-based arms company called Slide Fire Solutions.

“The people who attended the concert have suffered so much already. The physical injuries are staggering, and we know the emotional injuries can be equally severe and long term,” the firm said in a statement. “Brady has decades of experience supporting the victims of gun violence and has been the only organization in the nation focused on seeking justice for them in the courts.”

The inventor of bump stocks, Jeremiah Cottle, has said he created the device to help the disabled who have difficulty operating firearms, according to The Dallas Morning News. Cottle’s small town company is based in Moran, Texas, a town with only 300 residents.

If the court decides in the firm’s favor, Slide Fire Solutions will be responsible for covering the costs of concert-goers ongoing mental health treatment.

Brady Center Co-President Avery Gardiner said the firm will also go after those who sell bump stocks, not just the original producer.

“It’s not just the makers, it’s who marketed and sold them,” she said. “They are all to be held responsible.”

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