ProMag 20 Round .223 Rem/5.56 AR-15 Magazine, Blue - COLA4

This replacement magazine for your AR-15 rifles chambered in .223/5.56x45mm. The body is constructed of heat treated steel with a black oxide finish for durability. Its chrome-silicon wire spring and precision molded polymer follower ensure reliable feeding and function.ProMag magazines are designed utilizing traditional stamping and welding of heat-treated high carbon steel. Every ProMag magazine is backed by a lifetime guarantee against manufacturer's defects.Features:Magazine body constructed of heat treated carbon steel with a black oxide finishInjection molded magazine followerMagazine spring formed from heat treated chrome silicone wireMade in USA