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Posted: 4/15/2005 12:19:24 PM EDT
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(I know this has been posted here before, but a Search turned up nothing)... I have several barrels without gas orifices drilled; I'd like to know the proper orifice sizes for 12 1/2", 14", 16", and 20". Thanks for your help! |
groups.msn.com/ThePennsylvaniaAR15ShootersSite/maintenancefaq.msnw their is a chart on this page.. 
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