JABTAC is offering free shipping on any order over $85.00 thru Monday. Code LD85. They also have the Frontier Armory LW15 complete polymer lower for $109.00
http://www.jabtac.com/advanced_search_result.php?keywords=frontier+lower&x=6&y=12
http://www.jabtac.com/advanced_search_result.php?keywords=frontier+lower&x=6&y=12