Friend of mine just purchased a used A-5. I have no clue about these markers. His problem is the velocity screw is loose and when you shoot the gun it works its way out. Also it dosen't seem to adjust the velocity in anyway. If I turn the screw all the way in it will not stop and come off the threads and fall in the gun. Any idea what is happening and how to fix this problem? Also how do you adjust the RT trigger? Gun is going full auto.
Thank you
Thank you

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