Shop › MAG RUGER-57 5.7X28MM 10RD STL 2PK MAG RUGER-57 5.7X28MM 10RD STL 2PK $85.95 Ruger Magazine, 5.7X28MM, 10 Rounds, Ruger-57, 2 Pack, Steel, Black 90712 Quantity: Add To Cart Added! Ruger Magazine, 5.7X28MM, 10 Rounds, Ruger-57, 2 Pack, Steel, Black 90712