^^^^FTW^^^^^http://www.slickguns.com/product/30-rd-brownells-ar-15-m16-military-spec-mag-899
8.99 for brownell's mags
Posted this in another thread but it's the best deal on PMAGs I've seen yet.
http://www.bullets.com/products/MAG571-BLK-PMag-30-AR-M4Gen-M2-Moe-5-56x45-Magazine-5-pack-/BL11888