The Stampede ECS Keychain is a Nerf promotional item.
It resembles a miniature replica of the Stampede. It appears to be made of rubber, and has a key ring at the end of the chain.
It was also held at a prize in a Singaporean event in which players had to take turns shooting targets at a booth. The event was meant to be participated in with new Stampedes. The event ran from the first of September and lasted until September 13th.