The stock you choose to use is irrelevant. You can use whatever stock you like. This part gets installed in between the lower receiver and the castle nut that holds on the tube that the stock mounts to. It needs to be installed within the lower receiver build, before that castle nut is torqued down and staked in place. If your castle nut is not staked, you can take it back off and then install this plate before you put the castle nut back on over it.