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ar-15 barrels.
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January 17, 2010, 09:08 AM
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Bartholomew Roberts
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Join Date: June 12, 2000
Location: Texas and Oklahoma area
Posts: 8,462
On an 18" barrel, I would go with a rifle length gas system. My personal chart is:
10.5"-14.5" = carbine gas
14.5-16.5" = midlength gas
17"* and up - rifle gas
*The 17" is only if MSTN builds it; otherwise 18"
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