I would like to spec and purchase a 5.56 AR style rifle. I am inspired to do so by all the great looking builds I have seen here I may be inspired but I'm also ignorant. Well, maybe that's a bit harsh. Just call me uninformed. Basically I have no clue about the various types of builds, options, "furniture", optics, specific features and specifications so I am looking for information, "do's and do not's", any specific experience (good or bad) that you've had with various builds, parts and options. I don't need you to lay it all out for me as I can do the research but I just need an overview of the good, bad and the ugly. Linking to sources, articles and other information you feel is relevant will be welcomed. Heck, if I learn enough I may even try my own build vs. buying one off the rack. Now how's that for inspired??? Thanks for any and all input.