I take that article with a grain of salt - consider the source. They have an obvious slant, and they are assuming the gun industry "has something to hide when it comes to their roles in gun violence". The gun industry has about as much to hide when it comes to mass shootings, as the auto industry has to hide when it comes to drunk driving accidents.
It's.
Not.
Their.
Fault.
Blame the shooter. THEY decided to kill innocent people...not "the gun".
Look at Europe. If people REALLY want to kill others...they'll find a way. Machete. Knife. Rental truck.
It's not the tool's fault - it's the person wielding it.