This polycarbonate, glass-filled stock is injection molded at pressures up to 20,000 psi and ultra-high temperatures to exact tolerances. The composition of this stock not only makes it lightweight but also impervious to weather conditions. Designed for standard factory contour.
Instructions with stock will reference a mounting bracket "E" - this bracket is a flat black plastic plate with a hole for the stock mounting bolt. This plate may already be installed in the buttstock. When you remove the buttpad and look into the stock, if there is a round hole visible (the hole is for the stock mounting bolt), then the bracket is already in place.