[dpvu]

I recently put a new mechbox in my JG HK416 and the gearbox itself works fine, however, I'm having air seal issues with the 2-piece hopup. The BBs feed into the chamber fine, however, they won't fire. If I take the top half of the hop up out and just hold it against the mechbox it works fine (BB fires). I'm not sure why it's not sitting right inside the gun.

I've tried shaving a bit off the front of the tappet so it rests more forward and I'm using the longest V2 nozzle I have and have tried 2 different tappet plates. This is really starting to piss me off. Would switching to a 1-piece hop-up solve this? What else could I do?