The UTG® Gen 2 windowed polymer magazine for Glock® is a 33 round durable and impact resistant glass fiber reinforced polymer 9mm double stack magazine for Glock® 9mm double stack pistols and compatible clones and rifles. The windowed magazine is compatible with left or right-handed magazine releases and externally features a flared lower main body with raised bosses for added grip retention, left and right-side windows and round count indicators, and an easy to remove for maintenance thermoplastic anti-slip base pad. Internals include a high visibility blue anti-follower and high longevity stainless steel spring for reliable feeding.