a cling? does that mean that the gun is actually turning over? or just nothing?
If they are just rolling out, without the trigger being pulled, it could be the hop-up. If it IS in fact shooting (spring is being turned over) then you have a problem inside the mechbox... likely relating to the sealing somewhere.
I suggest that you take it apart again, lube everything in the upper, look online to make sure everything looks right, then rebuild it.
Or, you could just tell us exacly every move you did in the box... in order. :nod:
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