California SB 704 mandates background checks on firearm barrels starting July 1, 2027
The Second Amendment Foundation is challenging California's Department of Justice over how the state will enforce SB 704, which expands background check requirements to include firearm barrels and receivers. The law treats these components as regulated firearms, forcing dealers to run NICS checks before selling them to customers. SAF argues the rule creates dangerous legal gray areas and discriminates against law-abiding gun owners.
Under SB 704, any person purchasing a barrel or receiver must pass a California background check identical to what's required for complete firearms. The state DOJ will manage the approval system. SAF contends the department's current rejection process lacks transparency and denies due process rights to denied buyers.
Why It Matters for Gun Owners
This law directly impacts how shooters build, maintain, and upgrade firearms. If you want to replace a worn barrel on your AR-15, you'll need DOJ approval. Same for purchasing a receiver to build a custom rifle from parts. The process creates a de facto registry of parts purchases and gives DOJ unchecked authority to deny sales without explanation.
SAF's challenge focuses on a critical problem: California's rejection system doesn't provide clarity on why someone was denied. Buyers get blocked from parts purchases with no meaningful appeal process. Innocent shooters face indefinite denials while the DOJ operates without published standards or timelines.
The law also creates practical chaos for manufacturers and dealers. Small shops that sell barrels, receivers, or complete firearms must install new background check infrastructure by July 2027. Compliance costs will be substantial. Dealers who miss the deadline face criminal penalties. Multi-state retailers must segregate California inventory from other states' stock.
For active shooters and daily carriers, this means longer wait times for repair parts. A broken barrel on your carry gun won't be a quick fix anymore. You'll need DOJ approval, which could take weeks or months depending on processing backlogs.
Background
California has systematically expanded firearm regulations over the past decade. AB 28 (2015) added background checks for ammunition purchases. SB 1100 (2018) created a licensing system for ammunition dealers. Now SB 704 extends the framework to parts, effectively making barrels and receivers regulated products.
The Second Amendment Foundation has successfully challenged California's gun laws before. SAF won the landmark case striking down the state's ammunition background check system in 2024. That victory proved these rules often fail constitutional scrutiny. SAF's current challenge argues SB 704 violates the Second Amendment and due process rights.
The lawsuit claims California overreaches by treating inert metal parts as firearms. A barrel is a component. A receiver is machined steel. Neither functions as a firearm alone. Requiring background checks on parts effectively prevents citizens from maintaining or building firearms.
DownRange Bottom Line
SAF is fighting to prevent California from controlling how you repair and upgrade your guns. The organization argues DOJ shouldn't have unchecked power to block parts sales without transparency. If SB 704 stands, other states will likely copy the model. Your local gunsmith won't stock barrels without approval systems in place.
The case will take years to resolve through the courts. Until then, California carriers face a July 2027 deadline when the system goes live. Gun owners need to understand what this means: parts purchases will require background checks, processing times remain unknown, and denials offer no clear remedy.
This fight matters because it determines whether gun owners control their firearms or whether the state controls access to components needed to maintain them.
