I second the Spikes suggestion an would also add in Ranier Arms. I have a Spikes in 5.56 with mid-length gas and it shoots great (1/7 twist) I also have the Rainier Arms Ultra Match in 300AAC. It is incredibly accurate.
"No free man shall ever be debarred the use of arms. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government"
-- Thomas Jefferson, 1 Thomas Jefferson Papers, 334