Daisy Model 21 Stock, reproduction. These are exact copies of the factory Stock made from fiber-reinforced resin. There is some very minor variation where the Front Screw goes. You must drill a pilot hole for the Tang Screw of the correct size or the Stock will split. The Tang screw should not be longer than 5/8 inch. The pilot depends on the size of the Screw you use. These Stocks are stronger than the hollow factory Stock but because the gun is so delicate and the Front of the Stock is so precarious if you are not careful the Stock will break at the foremost Screw hole. This item is non-refundable of it cracks during installation. Also fits Model 410.