Well, it didn't take for Chinese manufacturers to rip-off the EOTech XPS2 Zombie Stopper Design as EB Airsoft announce a replica made by AABB. It comes with a red/green Biohazard reticle, and biozahard markings just like the EOTech version. As for the price, it's US$48.89 which will surely make a airsoft zombie hunters happy. It's available in black and dark earth colours.

AABB Zombie Stopper Red / Green Airsoft Sight (DE)

AABB Zombie Stopper Red / Green Airsoft Sight (BK)