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What diameter, to the thousandth of an inch, is the opening for the barrel extension milled to? Is a thermal fit necessary with most barrels? — 1 Answer

by Rob the independent semi-liberal moderate, from WI, United States Asked on September 12, 2022

Name Grey Ghost Precision Forged Upper Receiver (5)
$114.00 $104.88 Save $9.12
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Answered by Ethan, Gear Expert, from IL, United States, on September 22, 2022

I would recommend reaching out to Grey Ghost Precision directly for more information.

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