SB 604 : Permit and Training Required to Purchase a Firearm

Position: Support Status: Senate Judiciary and Ballot Measure 110 Implementation.

Requires person to obtain permit before purchasing or otherwise receiving firearm under circumstances requiring criminal background check. Specifies qualifications for permit and procedures for applying for and issuing permit.


Jan 19, 2021: Referred to Judiciary and Ballot Measure 110 Implementation.
Jan 11, 2021: Introduced by Senator Frederick (D)

Key Points of Licensing and Registration:

  • Firearm licensing and registration laws are associated with lower levels of gun homicides and suicides.
  • Background checks augmented by handgun purchaser licensing are more effective than background checks alone.
  • Licensing and registration laws reduce trafficking and complicate efforts by juveniles and prohibited individuals to obtain firearms.
  • Licensing laws are associated with significant reductions in firearm homicides in large urban counties.
  • Mandatory registration requirements help law enforcement identify owners of firearms recovered from crime scenes, discourage illegal firearm sales, and disarm prohibited individuals.
  • The National Firearms Act (NFA) of 1934 was created in response to a rise in machine gun shootings. Today, shootings with firearms registered under the NFA are very rare.
  • Source: GVPedia and the Denver Accord

The Research Showing How Licensing and Registration Reduces Gun Violence

The following summarizes the research on licensing and registration with a specific focus on: homicide rates, gun violence in urban areas, suicide rates, the use of guns in crimes, and public support.

In 1995, Connecticut strengthened its background check requirements by requiring potential handgun purchasers to obtain a license and complete eight hours of handgun safety training before purchasing a firearm.  A 2015 study found that Connecticut’s licensing law was associated with a 40% reduction in firearm homicides over the first ten years after enactment. A 2019 study showed that California’s comprehensive background checks alone did not make a difference in firearm homicide rates.

In 2007, Missouri repealed its handgun licensing law. A 2019 study estimates that repealing the requirement for Missouri purchasers to obtain a license is associated with a 17-27% increase in firearm homicides. Missouri did not see an increase in non-firearm homicides during the same time period. These findings are consistent with a 2014 study also estimating the effects of the repeal of Missouri’s licensing law.

In 2016, 63% of U.S. firearm homicides occurred in large, urban counties, which contain 56% of the U.S. population. A 2018 study of large, urban U.S. counties found that permit-to-purchase laws were associated with an 11% reduction in firearm homicide.Comprehensive background check laws without licensing were associated with a 10% increase in firearm homicide.

2015 study found that Connecticut’s licensing law was associated with a 15.4% reduction in firearm suicide rates and Missouri’s permit to purchase repeal was associated with a 16.1% increase in firearm suicide rates.

Studies suggest that mandatory registration and licensing requirements make it more difficult for individuals at high risk of committing crimes to acquire firearms. A 2001 study found that U.S. cities located in states with licensing and registration systems had an average of 33.7% of crime guns first sold by in-state gun dealers, compared with 84.2% in cities without registration or licensing. States with registration and licensing systems have a lower portion of crime guns with in-state origins.

2013 study found that the repeal of Missouri’s licensing law was associated with an increase in the diversion of guns to criminals. The average share of crime guns originating from Missouri increased from 55.6% before repeal to 70.8% in 2011.

National surveys find that three-quarters of Americans, including a majority of gun owners, support requiring a permit before purchasing a handgun.