1:1 replica of the resin stunt prop design used in the later series of the reboot. 
The originals used the toy prototype as a base, so this serves as an interesting "what if" item in regard to scaling accuracy. 
The replica can be slid up and down, but features no electronics just like the original pieces used in filming. It has been crackle painted too using plastikote crackle paint. 
Made to order so production times can vary.