Correct me if I'm wrong, but do the new ICS M4 nozzles have O rings, I am trying to make the gun as efficient as possible compression wise. Without the O ring, the fps would drop about 100 fps occasionally. I also have not done anything to the barrel ring, only the nozzle change and addition of the O ring.
Last edited by DropHack; March 1st, 2016 at 10:16..
Reason: missed some information]
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