Why my AEG is weak after I opened the gearbox?

[mirrage]

I finally found a solution to the weakness of my AEG.
During the last inspection I did before I through the AEG out the window
I greased all the gears and moving parts including the piston head the
cylinder and the cylinder head.After that I closed the gearbox and after a
quick inspection I found that the cylinder was protruding on the left of the
gearbox.It was easy to see the gap and thats why I found it.I unscrew a bit
the screws realigned the cylinder and tight the screws.After that I shoot a
few BBs and everything was OK.I don't know how many fps it shoots at but
it can penetrate two pieces of carton box at once and from distance.
Before it couldn't penetrate even from 0 distance.
I laso installed metal bushings.


Conclusion

FPS restored because of lubricating and correct alignment of the cylinder.


I want to thank all of you for your help and your advices!