This week a judge in the state of Connecticut denied a motion by gun manufacturers to dismiss what could be a landmark case for the industry.

Families of many of those whose lives were lost in the tragic shooting in Sandy Hook are filing a lawsuit against these companies for “making a gun they knew or should have known served no purpose but to kill large numbers of people.

The gun companies named in the suit filed a motion to dismiss the suit under the Protection of Lawful Commerce in Arms Act (PLCAA). It’s a 2005 federal law that allows gun businesses broad immunity from civil lawsuits. Connecticut State Judge Barbara Bellis rejected the gun companies’ motion.

So this is one that will go onto court and if the plaintiffs are successful this could change everything we know about guns in America.