2005 Cybertron Primus Transformer Toy

This listing is for a Cybertron Primus Transformers toy dated 2005 and made by Hasbro/Takara. Adult owned. Toy is missing multiple parts. I can’t figure out how to pop his head up. (The key is one of the missing parts) Consider this is in fair to poor condition. Toy is heavy and weighs nearly 3 pounds. Please examine photos for condition and ask any questions before purchasing. Cross posted.