If it's called Dragon fire, it's not a madbull.
Because it really is a Noveske 12" rail. And Madbull has the rights for this. No need to name it different.
Also, real Madbull ones come with a metric threading. That fits on TM-compatible guns, including King Arms but NOT G&P.
Clone Noveske rails have sloppy tolerances, so they will sometimes fit both.
Madbull also makes a special delta ring for G&P receivers.
http://madbull.com/catalog/index.php...roducts_id=257