Quote:
Originally Posted by Dynamo
was one of your upgrades a new cylinder?
i was having some FPS issues with my gun for a while.
i was using a new systema M120 and getting no more than 300fps.
turns out that i had a non-ported cylinder, so i was getting "suckback", as the piston was pulled back, it would cause a vacuum and suck the BB back slowing it down.
now that i replaced the cylinder with a ported one, im just under 400fps.
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That makes no seance. it's vise verse. ported with long barrel = suck back, non-ported with short barrel just maximizes damage caused to mechbox shell.