i have an airsoft metal body that i want to thread so that it can fit a real steel buffer tube. are there any service that the real steel community kno about?

in airsoft i notice that most of the buffer tube are slanted downwards giving it a flimsy appearance. threading the rear end of the metal body to fit a real steel buffer tube will give it a more erect appearance adding to the "cool" factor to my gun.

your help is very much appreciated.