Varmint AR upper build

[bigmuskie]

So it has been suggested that I build my upper as opposed to buying one that's already built. So far this is the list of parts I have picked out. If I'm missing something please chime in.

I've selected two barrels. If you have any input on either one, I'd like to hear about it.

http://www.whiteoakarmament.com/xcart/product.php?productid=17824&cat=250&page=1

http://www.fulton-armory.com/barrelfa20nmhbarss1x8plainmuzzle.aspx?variationid=1988

I already have an assembled Double Star lower, so I'm using these parts to keep from mismatching parts. I already have the Rock River chrome BCG, but I still need to pick up a charging handle.

http://jtdistributing.net/store/product280.html#280

http://jtdistributing.net/store/product928.html#928