Not a huge discount, but a decent deal for a budget build. About 50 bucks cheaper than midway or brownells, never ordered from these guys but a good price and supposedly 200 in stock... good luck
http://www.slimstacticalguns.com/Ma...-Black-Mil-Spec-AR-15-MAG307-BLK_p_26367.html
http://www.slimstacticalguns.com/Ma...-Black-Mil-Spec-AR-15-MAG307-BLK_p_26367.html