Description PRODUCT DETAILManufacturer Number: AK-A19 ProMag AK-47 7.62x39 Magazine 40 Rounds Polymer Black Caliber: 7.62x39mm Capacity: 40 Rounds Body Material: DuPont Zytel-Based Polymer Spring Material: Heat-Treated Chrome-Silicon Wire Follower Material: DuPont Zytel-Based Polymer Follower Color: Black ProMag Lifetime Guarantee Color: Black