Springfield Armory used to rebuild Garands in the Mid 90;s w/ standard & match grade .308 barrels. ( I had a rifle rebuilt by them, with a match grade .308 barrel, but not to match grade spec's, limited funds at the time) Of course this was the time to grab all the spare parts you could from other vendors to attempt to built that correct garand, when parts were plentiful. The Sarco --spare--parts kit come from the Italianicon BM59 version of the M1 Garand, that had been built to use magazines, basically a precursor to the M14icon. It was an economical way to upgrade the garand design.