I just had an AR 15 built for me custom to what I wanted. Personally I would do some research, look at whats out there and then build something based on what you want. There are alot of cheap AR deals out there but the old saying, you get what you pay for applies here. Just like jeep parts, it works the same for guns. You buy a cheap gun you will need to replace things eventually. I built an all aero precision AR15 .223/ .556 with the colors I wanted, handguard length,style and all for a good price. Now I am saving for the optics. I have magpul flip ups and am deadly at 100yds with it. Maybe I will get a bonus at xmas and be able to buy a good red dot optic.