Stevan, this will use any of the SR-25 Pattern 308 magazines (308/7.62x51/6.5Creedmoor) are all short action and use the same AR-10 Magazines. budsgunshop.com/catalog/product_info.php/products_id/714007075/Magpul+MAG291-BLK+AR-10+PMAG+GEN+M3+20RD+308WIN%2
