The first heavy barrel (1 in 12 twist)that used triangular hand guards was the Colt 606, four variations manufactured. I found this upper years ago in almost new condition.Attachment 112087Attachment 112088Attachment 112089Attachment 112090
The first heavy barrel (1 in 12 twist)that used triangular hand guards was the Colt 606, four variations manufactured. I found this upper years ago in almost new condition.Attachment 112087Attachment 112088Attachment 112089Attachment 112090