Sometime in the early 1980's I received this barrel as a gift from a good friend, he said he had found this barrel in the early 1960's. It is chambered for the 5.56mm and has a twist of 1:14 and is six groove. Also found a steel gas tube and early flat front sight base. Any opinions concerning the barrel ?Attachment 23970Attachment 23969Attachment 23968Attachment 23971
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