Quote:
Originally Posted by The Saint
You can always use a cylinder that provides you with more volume than needed. That isn't a big deal. More you can just find a 1/2 port cylinder, they're usually listed for MP5K.
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While it does work to use a cylinder which provides too much volume, the spring hasn't reached optimal expansion speed by the time the bb has left the gun on such a short barrel. So the half ported cylinder allows the spring to reach maximum velocity before pressure is exerted on the cylinder, providing the best velocities for your bb.