Ok, I am looking to get myself a AR. Some things I do know are that I would like to have the 5.56/.223 caliber, I want a flat top that has sights ( I assume I can remove the rear off the rail when it is time for the eotec), I want a carbine design, and a 6 position stock. I kinda like that I am hearing about RRA, STAG, and the M&P (stag?). I would like to get a used gun to save some money and have a little extra to customize it. I like the look of the rock river entry tactile, and i know dealer price on this gun is 795, but I am not willing to pay the local store 1,000 for it. No offense, but I refuse to pay someone 200 bucks just to make a phone call for me. Is there any other site's then gunbroker.com that I can look for one.