CA also has the strictest magazine capacity ban in the nation, though in application it’s currently difficult to enforce. Magazines with a capacity greater than 10 nominally cannot be bought, sold, or possessed by anybody except police. The loophole is if you possessed the magazine in California before the ban went into effect. If you moved here after the ban went into effect you can’t own them at all, but the State has to go back and establish when you moved. Hi capacity mags cannot be inherited, if a legal owner of a high capacity magazine dies the magazine must be immediately surrendered to an FFL, law enforcement, or shipped out of state.