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.
Features:
- Magazine body constructed of heat treated steel with black oxide finish
- Injection molded magazine follower
- Magazine spring formed from heat treated chrome silicon wire
- Made in USA
Specifications:
- Caliber: 5.7X28MM
- Capacity: 20 Rounds
- Color: Blue
- Finish: Blued
- Fit: Ruger 57
- Manufacturer Part #: RUG-A42
- Subcategory: Pistol Magazines
- Type: Magazine