https://criterionbarrels.com/product...v=00dc5da36527
Not .625 GB but it 14.5 lightweight mid-gas system. In this day and age, I don't think you are going to find one with a pinned FSB, but I could be wrong.
Dr. Carter G. Woodson, “History shows that it does not matter who is in power or what revolutionary forces take over the government, those who have not learned to do for themselves and have to depend solely on others never obtain any more rights or privileges in the end than they had in the beginning.”
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