New Frontier Armory LW-15 Lower: $109.99 (yeah, I sell them, not like that's a secret
)And this upper from JSE Surplus: http://www.jsesurplus.com/custom16hbarm ... 1-2-2.aspx" onclick="window.open(this.href);return false; (they're out of stock now, but it gets refreshed weekly).
Presto! Complete AR-15 for UNDER $500.