ack. Clones of real sights are usually marketed at the Airsoft guys because their guns don't need to stand up to the punishment of a actual weapon... For the money you'd be better getting a cheaper RDS like Tasco BSA or whatever... It might not Look like a EoTech but it'll work. Barskas aren't too terrible either if your looking to save some cash.
Sorry you had to find out the hard way. I have a few friends that are airsoft junkies... So you have no idea how many times i've heard the word REPLICA.