BB guns are not illegal; however, some states have more restrictions placed on their use than other states, according to FindLaw. Federal laws restrict BB gun ownership to U.S. citizens who have not been convicted of major crimes.
Two states in particular, Massachusetts and California, have more gun laws regarding BB guns than other states. No minors are allowed to own a BB gun in California, notes FindLaw. This is not the case for many states because BB guns are usually the first step in showing a minor how to properly care for, handle and shoot any type of gun.