New to the forum but I figured this would be a good first post. I just picked up completed DPMS lower this past weekend for a decent price, I would like to know one's opinion on what upper I should use/get. I'm leaning towards carbine/mid-length as most of my shooting will be under 200yds. Preferably a completed upper. I will be accessorizing it later down the road as well. My price ceiling around 550-600. Any information would be awesome. Thanks