ProMag Ruger-57 5.7x28mm 20-Round Magazine

This ProMag magazine is a 20-round replacement magazine designed to fit Ruger-57 pistols chambered in 5.7 x 28 mm. The magazine uses a heat-treated steel body and an injection-molded follower, and the spring is formed from heat-treated chrome-silicone wire. Production sources indicate it is made in the USA. Source materials list differing finish/color descriptions; see notes for details.

Key Specifications

• The capacity is 20 rounds.
• Compatible with Ruger-57 pistols chambered in 5.7 x 28 mm.
• The magazine body is constructed of heat-treated steel.
• Finish/color is listed variably as Black Oxide and Blued/Blue Steel in source materials.
• Includes an injection-molded magazine follower.
• The magazine spring is formed from heat-treated chrome-silicone wire.
• Product type is listed as Magazine.
• Fit is specified as Ruger-57.
• Country of manufacture is listed as Made in USA.

Durable and straightforward in design, this magazine provides a serviceable replacement or spare for users of the Ruger-57 platform. Its heat-treated steel construction and mil-spec style components are intended to deliver consistent feeding and handling in everyday use. Whether preparing a kit or adding a functional spare, this magazine offers a simple, industry-standard option for owners of Ruger-57 pistols.