hop up trouble, BBs just plummet???

[In-land airsofter]

Im having trouble with my aeg hop up, whenever I shoot the bb's just plummet straight away, I've tried adjusting my pro win hop up but it just doesn't seem to lift it. I'm using a pro win m4 hop up with a modified firefly nub and madbull bucking both to flat hop. As well as a magic box miracle barrel. can anyone help me ??? Thanks.

 

[Monty]

Bucking isn't fitted properly.

 

[Rock-climby-Dave]

Are you holding the gun upside down? :lol: