Originally Posted by Chance_P
i don't think i would have a problem assembling a gun from scratch, im just not sure what to get and where to get it from.
Then I'll defer to others with more experience. But I would suggest the Equipment Exchange at ar15.com at a minimum as a source for parts.
Think about what you want this rifle to be. Then, if you're really serious about building it from the ground up, buy the best parts that will get you what you want.