This ProMag 30-round drum magazine is a reliable and durable option for your AR-15 with Glock-style magazines. Crafted from rugged DuPont Zytel polymer it features an injection-molded follower and a chrome silicone wire spring for smooth feeding and optimal performance. Its lightweight yet tough construction ensures long-lasting use making it perfect for high-round capacity shooting. Proudly made in the USA this 9mm drum offers functionality you can trust. Get maximum capacity and efficiency for your AR-15 setup today.