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Author Topic: drilling barrels for iron sights  (Read 381 times)

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Offline charles p

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drilling barrels for iron sights
« on: October 08, 2011, 05:59:50 AM »
When the factory drills holes for iron sights in barrels, how do they know the holes will end up at top dead center once the barrel is screwed into the receiver?  Are barrels mounted to the receiver before drilling?  Just wondering.
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