Have recently swapped one of my back up AR's over to 6.8spc and I have the barrel left over. Barrel is a DD 16" 5.56 1/7 twist. Comes with YHM low profile gas block, carbine gas tube and A2 flash hider. Barrel has at most 100 rounds through it and is in excellent condition. Gas block has some marks from installing the gas tube pin but nothing bad, FH a few marks from installing and removing. Sell for $200 FTF in Portland/Vancouver.