The Missouri Constitution already enshrines the right to bear arms, but a state senator wants to expand that protection.
The Senate General Laws Committee scheduled a vote Monday on the proposal by Republican Sen. Kurt Schaefer, of Columbia.
The proposed constitutional amendment would define the right to bear arms as "inalienable" and require the state to defend against any "infringement" of that right.
Schaefer filed his measure shortly after President Barack Obama outlined his plans for stricter federal gun control laws.
If passed by both the House and Senate, the constitutional amendment would need to be approved by Missouri voters.