This is a ProMag Polymer 30-round magazine for Ruger Mini-30 rifles in 7.62mm. Engineered from injection-molded, ultra-durable Zytel polymer with heat-treated chrome silicon springs, ProMag’s Mini-30 magazines are designed to endure serious operational abuse without compromising quality or reliability. Robust and lightweight, Ruger’s Mini-30 ranch rifle combines ultimate flexibility with the impressive stopping power of the AK-47’s 7.62mm cartridge. It’s available in a number of different configurations and ideal for various shooting applications. These improved ProMag magazines are designed to keep your ranch rifle running smoothly in any environment … These magazines also come with ProMag’s lifetime guarantee, ensuring you’ll receive a free replacement if you ever have issues with your purchase. Pick up a few spare 30-round magazines today!