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Author Topic: 9mm Carbine barrel  (Read 681 times)

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Offline Duckdog

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9mm Carbine barrel
« on: December 13, 2009, 10:41:18 AM »
Anyone with a 9mm carbine have any lines that run the length of the barrel on the inside?  Doesn't seem to affect anything.  I'm guessing that it has something to do with the way the lands and grooves are machined.
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