Uhh... use your words? I'm assuming that you attached the internals from an airgun to the side of your rampage. Please elaborate.
Not too much to elaborate, the internals of the Range Master slides right on to the side of my Rampage ( without having to sand, grind or glue anything)
The whole thing is on there pretty good, only way it goes on is SLIDING from top to bottom, it will NOT PUSH IN!
The Range Master barrel assembly still rotates, so the trigger can face up, down, sideways.
What else do you want to know?
Important note; You should only use the thick yellow rounds with the Range Master.
Also, during pumps it will want to slide forward, but all you have to do is hold it steady at the top.