Thread: Mp5 Tight Bore
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Old March 22nd, 2010, 07:51   #16
CDN_Stalker
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I think he means he put a long barrel on a gun with a non-ported cylinder, is why his range went way down. Anything between 100mm and 400mm needs a ported cylinder, port towards the rear. A semi-common mistake is to put it in with the port to the front, which will drop the power down a LOT.
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