I have already planned a couple builds for my first AR's So far i have just picked up a MEGA Gator stripped lower brand new. I have heard that these are very good lowers and figured it would be a good place to start for my varmint build. Still contemplating whether or not i want to do a .223. or .308? I have also ordered a Plum Crazy lower receiver with LPK and stock. I want to build up a mid- length 5.56 NATO, all mil spec parts, and keep my costs down as much as possible. I chose the Plum Crazy lower since the package price was right and I was curious about the use of the Polymer lower and wanted to test it out. Any suggestions or advice or help would be greatly appreciated.