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What is the "M14 spec muzzle configuration?"

DavidK

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Jul 27, 2006
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I have a Surefire muzzle adapter for a suppressor on my rifle (MB762ss01) and I am trying to find out what thread it is. All I can find online is that it works with "M14 spec muzzle configuration." Can anyone tell me what that thread is?

The rifle is not an M14, its a custom bolt gun that utilizes that adapter.
 
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