I just ordered a RRA Varmint A4 18" barrel with M4 six position stock for $895 shipped. Best price I found for a complete AR like this one. They'll customize for you too.
6 to 8 weeks shipping.
Phone 1-603-770-2281 and ask for Pete. Pete is one of the largest Rock River Arms dealers. He is a wonderful, honest gentleman. Tell him Trent sent you.