So a while back I scored a DPMS LR308 lower. Now, I am not an AR guy, but have the LPK in hand and I have ordered a Magpul PRS stock for it. I need a tube, buffer & spring... I think it is the A2 length, so would this work? http://www.brownells.com/.aspx/sid=5...Completion_Kit ? Building my own upper is an option as I have the barrel wrench and upper vice mount, but will probably purchase a ready built. I do not think I could save any money building my own, but it would be a good experience... Any help would be greatly appreciated. Regards, -two shoes