So I'm well on my way to obtaining all the pieces for my Mega Maten AR10 build. I bought the matched Maten upper and lower receiver set with the extended rifle length keymod handguard. I'm trying to select a buffer tube assembly (including buffer/spring) and a stock. Talk about confusing! So if I go with a standard milspec adjustable tube, does that mean I need a shorter 308 buffer and 308 buffer spring? Or if I go with an A2 tube I can just get a standard AR H buffer and standard spring? How the bubblegum do I know which to get and what butt stock to put on it? bubblegum! I'm going to have to look into this some more I can tell already. Anybody have any clues? Advice? What's a bad bubblegum stock to put on it and what buffer tube assembly would it require? I'm thinking about going with the Magpul PRS Stock. Now if I go that route I would need an A2 extended buffer tube and a standard H buffer and standard AR buffer Spring? Is that correct?