The black ones are $19.99 but if you choose the lighter colored ones (I think it’s called “sand”) the price drops to $14.99
https://gunmagwarehouse.com/magpul-...r-sr-308-7-62x51-ar-10-25-round-magazine.html
https://gunmagwarehouse.com/magpul-...r-sr-308-7-62x51-ar-10-25-round-magazine.html