Primary arms has Anderson closed ear lowers for 29.99 on sale right now.
Limit one.
http://www.primaryarms.com/anderson-manufacturing-ar-15-stripped-lower-receiver-closed-ear-ar-15-a3-lwfor-um-closed?trk_msg=B01USAJ7ETI4TBA869BU2L2EJS&trk_contact=CEJDH5TPDBB36CNC0KUV9FDBGG&trk_sid=3S09DAKNTM5TII9CELD6D967JO&utm_source=listrak&utm_medium=email&utm_term=SLOT_1&utm_campaign=17_05_Ad17_Memorial_Day