David Harrison

I just bought a sure grip stock for turkey hunting and apparently I need to get a recoil spring tube plug. Is this totally different than the one that is already on the gun? The parts list in the manual lists it as a stock retaining nut screw, but MWGW has a spring tube pin and spring tube pin assembly. Just wondering what I need to get, and I'm sure I'm not the only one with this question but I couldn't find it in any other forum. Thanks in advance.