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Old July 01, 2018, 11:04   #6
gunplumber
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Quote:
Originally Posted by Gazz View Post
It is a 20" Colt pencil barrel. Looking at it closer, the roughness begins just in front of the gas port so maybe moving the gas port would be required. When I say roughness I am talking about no or barely evident rifling that goes to about the muzzle. I don't think crowning would help.
I think pencil barrel will be too small diameter at the gas block journal.
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