Thompson Center Contender Super 14 7 MM T/CU Blued Great Shape. I have a used Thompson Center Contender 7 MM T/CU rifle barrel for sale. This barrel is used, and it’s in good shape. It shows a few signs of use, but looks very good overall. It has a blued finish. See pictures for condition. This barrel measures about 14 inches long from end to end. Bore looks excellent, it’s really clean.