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Posted: 9/14/2004 5:07:37 AM EDT
Does anybody know what the M4 gas port size is (on a 14.5" barrel) compared to a standard carbine gas port size (on a 16" barrel)?
Link Posted: 9/14/2004 5:19:47 AM EDT
Their the same on Colt rifles, .063.

Colt's gas port sizes are: [10.5" - .093] [11.5" - .081] [14.5" - .063] [16" - .063]

Mike
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