This is a factory .308 Win/7.62x51mm 10-round magazine for Smith & Wesson M&P10 rifles.
Building on over 165 years of expertise, Smith & Wesson’s M&P rifles have set a new standard for high-quality, reliable AR-pattern rifles at virtually every price point. And these factory magazines are designed to keep your M&P15 rifle running flawlessly.
These 10-round magazines are compact in size, making them ideal for shooting from a benchrest or prone. Crafted from durable, lightweight aluminum with polymer followers and high-tensile steel springs, these magazines are designed for Smith & Wesson M&P10 rifles but also fit with DPMS/SR-25 pattern rifles.