DSA Inc. 30 round PMAGS

[cobra1]

I did not order any cuz I don't need them, so don't know for sure. $38.15 TYD

http://www.dsarms.com/30-Rnd-AR15-MagPul-Polymer-PMAG556mm_223-----MPMAG211/productinfo/MPMAG211/

and you'll need this...

http://browngirly.com/2012/09/05/vaseline-for-moisturizing-and-sealing/