They accuse the companies of partnering to promote and create content designed to glorify combat, gun violence and killing that effectively trained the teenage shooter before he killed 19 students and two teachers in one of the deadliest school shooting in U.S. history.
"There is a direct line between the conduct of these companies and the Uvalde shooting," said Josh Koskoff, an attorney for the families. "This three-headed monster knowingly exposed him to the weapon, conditioned him to see it as a tool to solve his problems and trained him to use it."
According to the lawsuits, the Uvalde shooter had played versions of "Call of Duty" since he was 15, including one that allowed him to effectively practice with the version of the rifle he used at the school.
The lawsuit against the game company said it has created a hyper-realistic game where "although the killing is virtual, the weapons are authentic — they are designed to perfectly imitate their real-life counterparts in look, feel, recoil and accuracy."
Instagram does little to enforce its rules rules that ban marketing firearms and harmful content to children, the lawsuit said.
The gun company scored a "marketing coup" with its weapon featured in the game, the attorneys for the family said.
"Simultaneously, on Instagram, the shooter was being courted through explicit, aggressive marketing. In addition to hundreds of images depicting and venerating the thrill of combat, Daniel Defense used Instagram to extol the illegal, murderous use of its weapons," the families' attorneys said in a statement.
The Uvalde shooter opened an online account with Daniel Defense before his 18th birthday, and purchased the rifle as soon as he could, the lawsuit said.