I apologize for my illiteracy! I don't know where the 6.8 came from. I am going with the 6.5 Grendel because of the effectiveness down range. I was torn between several different calibers all which would serve different purposes, but my conclusion was that I want something that will reach past 500-600 yards no problem and run on the standard AR platform.
Thank you for the advice and tips thus far. I would also like to know if anyone has a preferred brand of tools. This is where I have to start, and at the moment I have nothing for an upper assembly. Blocks, wrenches, smithing tools. If you know of any that are better than the rest (but still affordable) please let me know.
No kingdom can be secured otherwise than by arming the people. The possession of arms is the distinction between a freeman and a slave.