Ruger Ruger-5.7 5.7x28mm Pistol Magazine 20 Round Black Oxide 1 Pack Steel 90700-20RD. Specifications for Ruger Ruger-5.7 20 Round 5.7x28mm Pistol Magazine: Manufacturer: Ruger Gun Make: Ruger Gun Model: Ruger-57 Caliber: 5.7x28mm Magazine Capacity:...