I have a dboys M4 with some echo 1 parts added on that is having issues.
When it fires, it takes several cycles to get a single bb down the barrel. If you fire with a mag attached, it ends up feeding a bunch of bbs in the barrel until they all come out together.
If you load a single bb manually and fire it a few times, when it actually does come out it is at a very low velocity. The gearbox is basically brand new, and although I put it into an echo 1 body, I have not opened it.
Is there someone here I could take this gun to to take a look at it? Anything that I could check on myself first?