The Missouri Legislature has sent Gov. Jay Nixon a bill that would nullify federal gun control laws and allow designated school personnel to carry concealed weapons.
The measure passed 116-38 by the House on Wednesday would declare all federal laws regulating guns to be unenforceable within Missouri's borders.
The legislation would also allow guns less than 16 inches to be openly carried even in localities that have ordinances prohibiting open-carry. It would also lower the minimum age required to obtain a concealed weapons permit from 21 to 19.
A Missouri House committee has advanced a proposed constitutional amendment aimed at protecting gun rights.
The amendment approved on Tuesday would define the right to bear arms as "unalienable" and require the state to defend against any "infringement" of that right. It would also include defending one's "family" with a firearm as a guaranteed constitutional right.
Sponsoring Republican Sen. Kurt Schaefer, of Columbia, says the legislation would protect against proposed gun control laws at the state and federal level.