So I think I'm going to stick with metal. In my price range I'm looking at Windham Weaponry. They use 4150 and I believe it's out of the original, do I dare say "Bushmaster" plant with some original employees. So any info on this idea would be highly appreciated since you all seem to be very knowledgable. Also would it be to my advantage to go with a 2 stage trigger or stick with a normal one. Thanks again all.