We didn't see an issued scoped M14 till around May '68. I was in Dak To and a 4th Inf. guys was loading up with up us and had the ART scoped M14. I asked him about it and was told it was issued to him at the 4th Div. sniper school on Pleiku just weeks before. didn't get to ask more as he was ranging out the side door as we took off of in the Chinook.
I used a 4X30 German for a time and settled on the old Leupold M3LR for my '81.