Hi i am planing on building an ar and i do not know alot about them so my question is can anyone help me out with like the basics. what mfg do you recommend what is a good site to go to just any info would help thanks pm me some pics if you could also so i can maybe see my options i know i want it chambered in 5.56 and i would like to have tack rail on top and tack rails on the forehand also thanks for any help