Knight’s Armament SR25/M110 7.62x51 magazines. Very highly sought after because of their high quality and reliability. They work in most .308 ARs except ArmaLite B models and the RRA LAR-8.
These are rare, and are used but good condition.
I have 3 of these left, all the rest are sold.
$70 shipped each, $200 for 3.
Thanks for looking!