get palmetto blemished upper and lower stripped,
ptac BCG, or a rock river chrome BCG, if you want a little nicer
rock river parts kit with varmint trigger,
sopmod stock, magpul STR, B5, RRA operator stock
misc upper parts don't really matter,
hogue grip
midwest industries gen 2 SS float tube.

thats the basic setup there. the rest is barrel, I like a midweight barrel, or if you want a 20" barrel I like a hybrid contour, like criterion sells, lilja ar 740, black hole LTR etc. for an all around rifle I like 18" barrel length, midway has an AR stoner fluted 18" barrel that is pretty handy, as for optics a 3x9 scope or 2-7 scope of your choice.