Oryx Chassis Stock Spacer Kit - 4 Pack- Easily adjust the length of pull (LOP) on your Oryx Chassis Stock with these buttstock spacers. You get a package of 4 spacers, each 1/4" thick plus a set of longer butt stock screws. Theses spacers are easy to install, too. All you have to do is loosen the buttpad screws, slip the desired number of spacer(s) into the gap, and tighten the screws back up. These spacers fit all Oryx chassis stocks.