Air Force Premium Grade. Essentially the AF National Match, usually built at Lackland AFB. CMP got a bunch of them back in 2012 and we wrote them up in the GCA Journal. The barrels are hand stamped AFPG.
The issue was Summer 2012, lots of great details on this variation. One I always thought was cool was the stock marking: last four serial digits, the date built, and one to five punch marks in the channel that we speculated identified the armorer.