So, I can't find an AR-10 section. I have a question anyway. I have a DPMS LR-308. It currently has a Magpul PRS stock. I want to switch it to a mil-spec adjustable stock. I can't find a 308 mil-spec tube on DPMS's web page, only commercial. I talked to Mark there and he said to buy the parts individually if I want Mil-Spec. The threading on AR15 buffer tubes is standardized, so are the AR10's also? Any suggestions on a tube, spring, buffer combo to work with a collapsible stock? Can I use my existing spring and buffer?