Irv, any SR-25 Pattern 308 Magazine will work such as : budsgunshop.com/catalog/product_info.php/products_id/714007075/Magpul%C2%AE+MAG291-BLK+AR-10+PMAG%C2%AE+GEN+M3+20RD+308WIN%2F7.62NATO+Black or budsgunshop.com/catalog/product_info.php/products_id/827
