I got a wild hair up my a$$ to build a very short barrel 300 BO that will fit into a single sling back pack. I have a lower built out, just need the folder. I might have an upper somewhere ready to be built out. I know that I need a handguard, barrel and a comp to put on the end.also a gas block ( that I have in the parts bin). I am assuming I would need a pistol length tube. I do not want to SBR because I will be carrying it between states. And to save space, time and money, no suppressor. Thinking the additional parts should run around 300 dollars it I have to buy them new. Open to suggestiond!!!!@