Bit of dis-information has been posted on this thread. All the stocks of a model do not come out of the same mold. We have multiple molds for most of our tactical stock designs. Different types of actions have different requirements in stocks for them. Tang shape and height, depth of action area at rear guard screw location, depth of action area at front guard screw location, slant on the bottom of the stock for the factory floorplate and magazine, etc. You can't just take a general one-stock-for-all-actions and inlet it to fit them all properly. A stock has to be designed and configured to fit a specific type of action properly.
For example, when we brought out the A-5 stock we wanted to cover the full range of most of the rifles our customers ask for. We had to make 7 different model variations to cover the range of rifles that we would probably get requests for. One variation for Remington ( and clones) and Savage type actions since these have about the same dimensions, one variation for the Winchester/Montana/Dakota type actions, one variation for the older Sakos, Tikka and Howa actions ( all have similar dimensions), one variation for the big Weatherby Mk V actions, one variation for the Sako 75 actions, one for the Kimber 8400 actions, and finally one for the custom thick rear tang benchrest type actions ( BAT's, Stolles, Kelblys, Bordens, Stillers, etc). For many of these we have multiple molds for each variation such as one for a solid fixed comb and one for an intergral adjustable comb. In all we have about 24 different molds just for the A-5 series of stocks, all at about $3500 apiece. That's about $84,000 invested just in molds for the A-5's.
All told we have over 200 different molds in the plant for all the stocks we make.
Just as an aside, the names of our "A" series tactical stocks such as the "A-2", "A-3" "A3-5", "A-4" and "A-5" are all registered trade-marks for McMillan Fiberglass Stocks and we do defend them. Any other manufacturer or seller who uses these names for models of other make stocks will get a friendly little letter from our legal firm.
Best regards and good night, Dick Davis
General Manager and R&D guy
McMillan Fiberglass Stocks