Madbull Propane adaptor
 

Theres no way i'm buying one of these, sticking with Carl's stuff.

Question about it though, did Madbull essentially just steal carl's design? aren't there copyright laws about that?

Doesn't even seem like they've done any proper research on propane being usable in airsoft guns, just went ahead and made it without info to back it up.

Carl made a post about this when the MB adaptor was first announced, shouldn't be hard to find.

Totally different working mechanisms. I've taken both apart to compare, it's not even close in design.