Thread: 300Whisper in the AR-15
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  #4  
Old 03-11-2010, 10:17 AM
dvanncvann dvanncvann is offline
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Join Date: Oct 2007
Posts: 40
Check the gas port size. I got 1 in the shop the other day that had a .223 gas port. We had to open it up to get it to function.
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