The Mako Group has 30 round steel AR mags available for only $18.70 plus you can get another 5% off by using coupon code "4GGuns" (no quotation marks).
The only catch is their current shipping time due to order volume.
http://www.themakogroup.com/product_p/earm30%20w.htm
The only catch is their current shipping time due to order volume.
http://www.themakogroup.com/product_p/earm30%20w.htm