It looks good... But I don't know anything about that company. Google or Bing and see if you can find any reviews... or does anyone here have any input about these guys ???
.... As for what else is currently available from Midway;
http://www.midwayusa.com/find?usersearchquery=ar+upper+complete&sortby=3&it emsperpage=24&minprice=399.00&maxprice=500.00&sear chscope=all