Re: MWS: Correct Buffer & Spring for PRS Stock?
I cant say for certain about the PRS, but with the UBR it uses the tube that comes with it (which is a "carbine" length system). AR10s use a "commercial" tube, not milspec. The buffers are different (shorter in comparison), the springs are also different but not sure if it is different enough to matter. AR15 buffers (of any length) are comparatively too long & wont give the bolt enough room to travel.