Gas block s

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GUN DOG

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Got all my pieces together for our first ar build. The barrels we have have one dimple for the set screws. Do you folks put a second dimple in the the barrel for the second screw our use the one and just snug the other up to the barrel surface.
 

HiredHand

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Set screw spacing is different depending on the gas block manufacturer, the dimple closest to the receiver is almost always 180 degrees out from the gas port. I'd add the second dimple and use the high temp Loctite 246 because 242 maxes out around 300F.
 

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