ProMag never stops reinventing the AR-15 magazine

The latest from ProMag is the combination of 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. This ProMag Magazine is constructed out of DuPont Zytel based polyerand heat treated steel with black oxide finish; steel upper, polymer lower housing.
 

ProMag Polymer Hybrid Magazine Specifications and Features:

• 30-round magazine
• AR-15 in .223 Remington/5.56 NATO
• Magazine body constructed from polymer and steel with black oxide finish
• Injection molded magazine follower
• Magazine spring formed from heat treated chrome silicone wire
• Steel/Polymer Hybrid Construction
• Black
• Made in the USA

Fits:
AR-15 .223 Remington or 5.56 NATO