We have been making stocks with a "True molded-in action" since we bought Six Enterprises in 1998. Six started doing this in the 70's. What this does, is allow full sheets of fiberglass and graphite to be laid directly under the barrel and receiver and allow the cloth to mold around the barreled action shape. This increases the rigidity and strength of the stock tremendously. Our BR stocks weigh in at 24 ozs, and I've seen 300 pound men stand on the stock in between centers and it just flexes. It is the most complete and rigid way to make a stock.