mG36 at home, but broken

Recently, when I used the phrase "my favorite ASG shop" I meant the asgshop.pl. It changes today! They aren't my favorite airsoft reseller anymore, 'cause they screwed up my replicas twice. The AUG was first (the guy who repaired the replica didn't replace the broken engine) and now the G36 is broken...

And what's the most hilarious in this whole story? I think I know what is the problem as I almost forseen it...

Two years ago I tried to replace the inner barrel for my G36. At that moment it was difficult to purchase a proper barrel since it wasn't available at any of local airsoft shops. So I bought some 509mm-long barrel for AUG and M15s. But I couldn't install it, as it had notches in wrong places. The notches are used to hold the barrel to the hop-up chamber.

When I unpacked the replica from the box, I found a small piece of hop-up assembly. This part - spacer - stopped me from installing the barrel when I tried it. On this photo you can see when this spacer goes on the barrel, it is the place where the notches are. I the notches are somewhere else, you can't install the spacer. And the spacer is very important as it: holds the barrel from sliping out of the hop-up chamber and holds the hop-up adjusting wheel from moving to the front.

Okay, so I took the mG36, plugged charged battery and then tried to fire the replica. It made some noise, as the gearbox worked. But the BB wasn't shot. The BB wasn't fed to the hop-up chamber and wasn't shot. I rotated the replica upside down to make sure there is no trouble with the high capacity magazine. Nothing changed. So I thought maybe the hop-up is set on high BBs turning and then I turned the adjusting wheel to the other side. Nothing changed, but the adjusting wheel moved a bit to the front of the replica.

As the mG36 doesn't work, it's going back to asgshop.pl for further repairs.