PROMAG RUGER 57 5.7X28MM 20RD BLUE

ProMag Industries Magazine, 5.7X28MM, 20 Rounds, Fits Ruger 57, Steel, Blued Finish RUG-A42 ProMag magazines are designed utilizing both traditional stamping and welding of heat-treated high carbon steel, and modern precision injection molding of mil-spec polymer compounds. Every ProMag magazine is backed by a lifetime guarantee against manufacturer's defects. Made in USA.