PHOENIX (AP) -- Arizona Gov. Jan Brewer has vetoed a gun bill for the fourth time this week.
Brewer vetoed Senate Bill 1366 by Republican Sen. Rick Murphy on Thursday. The bill changed the definition of a firearm to exclude some weapons.
The Republican governor says that would have allowed those weapons into public buildings and block police from confiscating the weapon.
Brewer also says Murphy's bill removed "readily convertible" from the firearm definition. Two people could then carry gun parts into a public building and reassemble it.
Brewer previously vetoed bills allowing guns in public buildings, imposing fines on cities and their lawmakers if they enforce gun ordinances stricter than state laws and one allowing an aggravated assault charge if someone wrestled a gun away from another person. That's already a felony.