Fred Guttenberg, who lost his daughter in the Parkland school shooting, said he was overcome with emotion when shouting out at President Donald Trump's address.
The former New York mayor has made gun control one of his key 2020 campaign pledges.
Colton Williams was hunting rabbit with his father and a family friend on Thursday when the incident occurred, family members said.
"The fact that he can shoot at me, and I can't shoot at him is not equal protection," one neighbor said.
The responses come after a spate of high-profile mass shootings across several states that have left dozens dead and rattled the country.
BenShot, a novelty glassware company in Wisconsin, bought all its employees the handgun of their choice to keep them "safe and happy."
The parallels between government and the themes of popular dystopian novels are striking. Every day, kids are being killed on the streets, in their schools, and at the movies.
"Keeping guns away from dangerous people and people with mental issues is what we need to do," Scott said.
The filmmaker wants to repeal the Second Amendment. And he's not the only one.
Firearms are a leading cause of death among children and doctors need to stop ignoring it, experts say.
Two Republicans are trying to pass a bill that would allow people in Wisconsin to carry guns without a permit or training.
Of all 50 states, Mississippi came in last for weakening gun legislation this year.
"Even people that believe in the right to bear arms, what right do you have to take someone's life?"
Physicians say the law amounts to unacceptable interference by the government.