http://www.bigsupplyshop.com/Mako-Group-AR15M16M4-Steel-30rd-EAR30W_p_37129.html
These appear to be gen3 which fixed some seating and drop-free issues with gen1 magazines. There might be some issues seating 28-30 rounds on a closed bolt. I don't own an AR but these seem like a good price. Shipping for ten magazines is about $15 and for twenty magazines it's around $18. I order most of my paper targets from this company and depending on what you order it's usually the best price around even after shipping.
These appear to be gen3 which fixed some seating and drop-free issues with gen1 magazines. There might be some issues seating 28-30 rounds on a closed bolt. I don't own an AR but these seem like a good price. Shipping for ten magazines is about $15 and for twenty magazines it's around $18. I order most of my paper targets from this company and depending on what you order it's usually the best price around even after shipping.