Why do you have to wait 3 days to purchase a firearm in Missouri?

In Missouri, a three-day waiting period for firearm purchases is mandated to allow for background checks and to help prevent impulsive decisions and potential violence. This cooling-off period gives law enforcement time to verify the buyer's eligibility and ensure they do not have any disqualifying factors, such as felony convictions or mental health issues. The waiting period aims to promote responsible gun ownership and enhance public safety.