"If somebody gets mad and flies off the handle, who's to say they don't pull it out and shoot it?" he said.
Schmidt said past school shootings, including the 2007 Virginia Tech incident, happened at schools with gun bans, so restricting guns won't necessarily prevent violence.
"As long as people are responsible gun owners (who) secure it and follow state law, that is not the problem," he said.
McManus said those who receive a concealed carry permit shouldn't pose a risk.
"Anyone who has a legal, valid CCW permit has to go through very rigorous testing and practice," she said.
Staff Writer Brian McGillivary contributed to this report.