Yes, you can purchase a stripped lower receiver in California. However, there are some important things to keep in mind before doing so. First, it is important to know that owning a stripped lower receiver is not the same as owning a firearm. To build a functioning gun, you will need to purchase several other parts and components. Second, you will need to have the proper paperwork and licenses to purchase a stripped lower receiver.
Lastly, it is important to be aware of all state and federal laws before purchasing or building a firearm. Although owning a Gun Control Act (GCA) regulated firearm is not prohibited by law in California, certain types of firearms are restricted. For instance, assault weapons and large-capacity magazines are prohibited in California. Therefore, you must be familiar with all state and federal laws before purchasing or building a firearm.