ProMag Ruger-57 Magazine Features The Ruger-57 Magazine is constructed from heat treated steel with a black oxide finish providing a durable corrosion-resistant body that holds up under repeated loading and use across demanding range sessions. The injection molded magazine follower ensures consistent round presentation for reliable feeding across a full 30-round capacity and the heat treated chrome silicone wire spring delivers consistent tension for dependable cycling from first round to last. Built in the USA to purpose-fit Ruger Ruger-57 5.7x28mm pistols this magazine requires no modification for a direct fit and reliable function. For Ruger-57 owners who want a reliable USA-made extended capacity magazine backed by ProMag s manufacturing standards the Ruger-57 Magazine delivers dependable performance shot after shot. Offering 30 rounds of 5.7x28mm capacity this magazine significantly extends the Ruger-57 s on-hand round count over the standard factory magazine making it a practical choice for extended range sessions competition or home defense applications where additional capacity is desired. The steel construction with black oxide finish keeps the magazine lightweight without sacrificing the structural integrity needed for consistent feeding across thousands of rounds. Sold individually it gives Ruger-57 owners a straightforward way to add extended capacity to their setup without the cost of a complete spare pistol package. For shooters who want a proven USA-made 30-round magazine for their Ruger-57 the ProMag Ruger-57 Magazine delivers and it is available for sale at GrabAGun. ProMag Ruger-57 Magazine Specifications Manufacturer: ProMag Model: Ruger-57 Magazine Type: Handgun Magazine Caliber: 5.7x28mm Capacity: 30 Rounds Body Material: Heat Treated Steel Finish: Black Oxide Follower: Injection Molded Spring: Heat Treated Chrome Silicone Wire Compatible Hosts: Ruger Ruger-57 Country of Origin: USA Available At: GrabAGun