I love it. We give 'em the rifles/carbines ... now they sell 'em back to us. Typical ...
These carbines are NOT being sold back to the United States...they are being returned to the US Army, and in turn released to CMP.
Based on pics I've seen of ROK carbines, many will be "Rack Grade", which means they are functional but have had a hard life and typically have muzzle barrel erosion of 3 or more. I could not tell from pics the condition of the barrels or crown, but did see the stocks were crapped out...numbers and letters and symbols painted on and generally beat up.
I've had 2 carbines from CMP--1 was returned from Austria and had barely been used (or perhaps not used at all) since rebuild at Augusta Armory, and have beautiful walnut stock. It had been shipped to me by the CMP South store in Anniston, and they did pick out a beauty. Only flaw was that it wasn't quite as accurate as the carbine I already had.
I sold the Austrian carbine for $600 to pay for 1/2 of a new Armalite AR15A4 National Match rifle.
The other, more acccurate carbine was a return from the Greek Air Force Security Forces, and had parkerizing worn thin, but was apparently carried but not fired much, as muzzle barrel erosion was "good as new", and it is a 2 MOA shooter. I hand-picked it from the CMP Store in Anniston, AL.
My experience is that if you buy a "Service Grade" rather than "Rack Grade" rifle from CMP you will get a very nice, functional rifle with acceptable stock. I expect they will continue to uphold their standards with the Korean rifles and carbines, so "Service Grade" might become hard to get!