I have a complete SIG 556 Classic lower assembly in EXC Cond. Comes with 5 SIG 30 rd mags (4 still in boxes with connectors). Side fold / telescoping stock. Would be perfect for a SBR conversion on a SIG 223 pistol. Sell for $595 shipped. No FFL required for this part. Additional pics available.

http://i5.photobucket.com/albums/y16.../SIG556001.jpg