It just needs headspacing and its ready to rock. Tried to build on the lighter side Mege Ten upper & lower. dpms chrome BCG *See Site News* 18" barrel YHM flash hinder hogue grip carbon fiber forearm brownells low profile bas block Ace stock Bushnell Elite 4200 6-24x50 weaver rings (Burris was either to high or to low) Timney 3lb trigger nice setup. I'll bolt on a pic rail for the bipod. Also the Mega already had two offspring already. I finished them off tonight as well. Now I'm broke but who cares.