This butt plate assembly will increase the LOP from the standard butt plate assembly minimum and maximum by approximately 3/8" but still provide full range of adjustability. It will provide vertical adjustability in both directions (up or down) of approximately 1-11/16" (one and eleven sixteenths inches) Removal of the butt pad is required for adjustment. Loosen the two clamping screws, adjust to desired vertical placement, tighten clamping screws and reinstall butt pad.