Well heres the plan so far, RRA stripped lower and 6 pos. stock permanently welded in either the fully collapsed or the next out position, pretty sure I want an A4 upper, with possibly a flip up rear sight because I'm about sick of carry handles. Should I just put together my own upper with perhaps an SS barrel, or something else? The RRA standard 16" uppers go for like 370.00 or whatever, but I'd like something differant.... So what are my options as far as optics? I'm pretty well limited in price for this one, so it would have to be under 900.00 :( Let me have it! Thanks!