I've built a few AR15's and this will be my first AR10 and the first time using a rifle buffer system. I read the sticky regarding buffers and according to the info AR15 & AR10 rifle buffer tubes are the same. I plan on using a Magpul PRS stock and was wondering why Magpul has a AR10 PRS and a AR15 PRS if the tubes are the same. Also, will DPMS 308 rifle buffers work in an Armalite rifle build? TIA