(a) As used in this part, “imitation firearm” means any BB device, toy gun, replica of a firearm, or other device that is so substantially similar in coloration and overall appearance to an existing firearm as to lead a reasonable person to perceive that the device is a firearm.
(b) As used in Section 20165, “imitation firearm” does not include any of the following:
(1) A nonfiring collector’s replica that is historically significant, and is offered for sale in conjunction with a wall plaque or presentation case.
(2) A BB device.
(3) A device where the entire exterior surface of the device is white, bright red, bright orange, bright yellow, bright green, bright blue, bright pink, or bright purple, either singly or as the predominant color in combination with other colors in any pattern, as provided by federal regulations governing imitation firearms, or where the entire device is constructed of transparent or translucent materials which permits unmistakable observation of the device’s complete contents, as provided by federal regulations governing imitation firearms.