ProMag's AK-S30 is a 30-rd magazine designed for the AK-47 rifle. The magazine body is constructed from heat-treated blued steel, with a follower made from proprietary DuPont Zytel based polymer. The spring is made from heat treated chrome-silicon wire for maximum reliability and smooth feeding. Fits most common variants of the Kalashnikov in 7.62x39mm.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 from heat treated steel with black oxide finish Injection molded magazine follower Magazine spring formed from heat treated chrome silicone wire Made in USA