Lawmakers overturned Governor Nixon's veto on House Bill 656. This now allows most people to carry concealed weapons.
The measure also expands self-defense laws and adds a lifetime option for concealed carry permits.
This makes the concealed carry courses unnecessary now - but experts say it is still important.
"And that's gonna be a thing again with going through a course is learning these things," said Rick Doan. "It's vitally important that you learn where you can carry and where you can't carry because just because you can carry doesn't mean you can carry any place."
In fact there at 17 places where you can not carry still.
Any law enforcement office
Within 25 feet of a polling place on election day
Any correctional facility
Any meeting of a local governing body
Any general assembly of a supreme court
Any store that dispenses liquor as its main source of revenue
Any place prohibited by federal law
Any riverboat gambling operations
Gated amusement park
Private property where the owner has posted a sign