Backed by generations of legendary excellence, Winchester USA stands for consistent performance and outstanding value, offering high-quality ammunition to suit a wide range of hunter's and shooter's needs. Exceptionally rugged, combat- and competition-ready magazine functions flawlessly, even when left fully loaded for extended periods. Corrosion-proof, self-lubricating one-piece body of fiber-reinforced, molded polymer has no spot welds or joints to impair the follower, and the constant internal curve ensures smooth, unobstructed movement of the round stack. Anti-tilt follower stabilizes the stack to help prevent nose-diving and bolt-over-head failures. Heat-treated, stainles Mfg: Brownells