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Old July 5, 2008, 12:01 PM   #22
Senior Member
Join Date: May 12, 2005
Location: Georgia, USA
Posts: 3,226
madcratebuilder If you shoot bullets that are over 165gr you need to tweak the gas system.
This has not been my experience. I have shot 175s and 180 sub sonic without issue.
Standard gas cylinder, plug and piston. I have no need for a grooved piston.
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