I've been thinking of building an AR. I'll build the lower from parts and slap an upper on it. I'm sure I'll end up with something distinctly frankenrifle, but I don't care. I just want something that's pretty decent all-around and inexpensive. Not going to mount an absurd scope on it, nor do I want a 24" varmint upper. I'd like something more accurate than my AK. Any suggestions? I can source RRA, Stag, and DPMS lowers for ~$150, ~$120, and ~$110 respectively. Otherwise ... not so sure what to go for.