This aftermarket magazine from ProMag is designed to fit the Ruger-57 handgun chambered in 5.7x28. With a capacity of 20 rounds, it is an excellent choice when needing a spare unit for plinking and range training. ProMag manufactured these from heat-treated steel with a durable black oxide finish capable of enduring rough use during intense shooting sessions. Internally the polymer follower is paired with a chrome silicon wire spring that has received a heat treatment for increased strength and long term reliability. These American made magazines are backed by ProMag's lifetime warranty against any manufacturer defects. As one of the leading magazine manufacturers in the industry, ProMag products are trusted by shooters from every walk of life to personalize and increase the capabilities of their favorite firearms.

Features and Specifications:
Manufacturer Number: RUG-A42
Fits: Ruger-57
Caliber: 5.7x28mm
Capacity: 20 Rounds
Body: Heat Treated Steel
Follower: Polymer
Spring: Heat Treated Chrome Silicon Wire
Baseplate: Polymer
Finish: Black Oxide
Made in USA