Re: McMillan LOP spacers
Add spacer:
Loosen the buttpad screws and drop the open slot on the bottom of a spacer onto the lower screw, while pivoting the spacer into place lining the slot on the top side of the spacer with the top screw. When in place, slide down and tighten screws.
Remove spacer: Loosen screws, reverse above, tighten screws.