The R15 magazine helps you to maximize your time at the range and in the field. Constructed of lightweight aluminum, the low profile, compact 5-round magazine has a compact design offering minimal weight and bulk for a great alternative to times when a long 30-round magazine is cumbersome or not permitted. Magpul Gen II self-leveling follower of durable, self-lubricating reinforced polymer helps ensure smooth, reliable feeding free of jams and other magazine-related failures caused by uneven movement of the round stack. Chrome-silicon steel spring is highly resistant to corrosion and won't lose spring force if magazine is left fully loaded for extended periods of time.