I've considered a few different options and I'm still not even sure which caliber to go with. I'd like something cheap to shoot like 9mm, but I'd be perfectly fine with .223. Does anyone make an affordable 9mm upper? The best ones I could find were RRA's but I haven't done much shopping, either. I'm also okay with just buying an already-built AR and being done with it. Budget is one of my biggest concerns right now and I'd like to stay around the $700-ish range without accessories. I found this link yesterday: http://cmmginc.secure-mall.com/shop/?shop=1&cat=33& Would that be an okay way to go? There's so many options I'm completely at a loss of which route to go.