Through slick guns today. Went to the sight and the price was even less. Shipping was cheap. I hope I left some for you guys. Says $51+ for 5 but it was nearly $10 less on the site.
http://www.bullets.com/products/MAG571-BLK-PMag-30-AR-M4Gen-M2-Moe-5-56x45-Magazine-5-pack-/BL11888
http://www.bullets.com/products/MAG571-BLK-PMag-30-AR-M4Gen-M2-Moe-5-56x45-Magazine-5-pack-/BL11888