The ProMag RUG-A42 High Carbon Steel Magazine offers unmatched durability and reliability for your firearm needs. Crafted with precision, it combines traditional manufacturing methods and modern materials to deliver peak performance. Engineered from heat-treated high carbon steel and mil-spec polymer compounds, this magazine is built to withstand rigorous use. It comes with a lifetime guarantee against manufacturer's defects, ensuring a reliable companion for shooters. 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 Choose the ProMag RUG-A42 for a magazine that stands the test of time.