Originally Posted by Quentin
I'd say read the AR-15 Primer sticky first then start forming in your mind the configuration you want. There are so many ways to roll an AR you have to give thought to what YOU want and what is important to you.
Considering your budget, look at PSA's website for configurations. They offer a fine rifle at a great cost.
I have to say, I followed Quentin's advice on this. I'm a big fan of PSA's. I've bought most of the parts from them.
Also I used the following as instructions:
"Building Your AR-15 from scratch" , by Lenny Magill, from www.gunvideo.com
I'm certain most or all of this info is available online, but I wanted a single source.
Good luck and have fun.
ps... I posted my build progress here:
It might be of some help to you.