The KICK-EEZ "KZ-TAC1" pad is a pre-fit replacement for Magpul PRS series stocks. These pads come in two thicknesses, 1/2" thick and 15/16" thick. This can also be a great grind to fit for any similarly styled stock.
-Magpul PRS GEN3 Precision-Adjustable Stock
-Magpul PRS Lite
-Magpul Pro stocks