Like new HK MR762 A1 heavy barrel. This barrel is threaded in M15x1 metric thread. Barrel is 1/12 twist rate and a very early serial number in the 500’s. Also to note is the NH proof mark that indicates just how early this barrel is. This barrel was finished off when HK USA was operating out of a Wilcox facility in NH. This is a neat find for any HK collector or if someone is looking to do a 16” HK417 clone.