A controversial part of the new law is known as the Coach Aaron Feis Guardian Program, which arms some teachers if both the local school district and local sheriff's department agree. "I'm going to be an NRA member when I'm not governor", Scott said at the bill signing.
"The hardest thing I've ever had to do as governor is try to find the words to console a parent who has lost their child", he said.
"We filed a lawsuit against the state for violating the constitutional rights of 18- to 21-year-olds", said Marion Hammer, lobbyist for the NRA in Florida.
The NRA argues people who are 18 years old are considered adults "for nearly all purposes and certainly for the purposes of the exercise of fundamental constitutional rights".
It also contends federal law already prevents many Americans 21 or younger from buying certain types of guns.
Bondi also lauded the students of Stoneman Douglas, many of whom have called for tougher gun laws.More news: Stock In Spotlight: Enterprise Products Partners LP (NYSE:EPD)
Cameron Kasky, one of the survivors of the February 14 Parkland shooting, said in a tweet that the Florida bill was only the first step.
"As a business man, I have always rejected the idea that government has to be slow", said Scott, who moments earlier had met privately with the victims' families. The group promptly filed a lawsuit to block the provision that raises the age to buy guns, arguing that it violates the Second Amendment. "It's nowhere near what we want, but it's progress and uplifting to see".
Lastly, it creates a so-called guardian program enabling some teachers and other school employees to carry guns. "If counties don't want to do this, they can simply say no".
For some shooting survivors who demanded an assault weapons ban, the measure didn't go far enough.
More than 60 GOP lawmakers with "A" ratings from the National Rifle Association (NRA) voted for a sweeping school safety bill in Florida that raised the minimum age required to purchase a rifle to 21 and banned bump stocks. It also gives law enforcement more power to seize weapons, prohibits the sale of "bump stocks" - devices that can be put on semi-automatic weapons to increase their rate of fire. The supporters of this bill have, however, claimed that in case teachers are allowed to carry guns to the school, they will be able to save lives in case of a shooting within the school premises.
Full-time classroom teachers are exempt from participating in the guardian program unless they are JROTC instructors, current military service members, or current or former law enforcement officers.