Forgive me being abrupt but "ARE YOU TAKING THE PISS?"
The old RT is a tap loader
You say that the loading mech is missing; if thats the case how the ell do you know that it loads and fires?
You ask if it is a .177 or a .22?
I am assuming that because you say it loads and fire's you have some pellets and should be able to answer your own question
Again, sorry for being abrupt, I'm not trying to be offensive, but your post just doesn't ring true to me!
Tony
i think but could be wrong the zodiac was the tap loader the tornado was the break barrel version