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It cannot Stuart. This is a "Rear Catch" Magazine for the M1A and not an SR-25 Pattern Magazine. You will need these magazine : https://www.budsgunshop.com/catalog/product_info.php/products_id/714001426/Magpul+MAG290-BLK+AR-10+PMAG+GEN+M3+10RD+308WIN%2F7.62NATO+Black -- https://www.budsgunshop.com/catalog/product_info.php/products_id/11560/Armalite+10607001+AR-10+Magazine+10RD+308WIN+Black+Steel+GEN+II --