Magpul PMAG MOE Magazine with window, 10 pack, Black Magpul PMAG AR-15 Magazine with window, 30 round AR15. The Magpul PMAG 30 round magazine is a lightweight 5.56 NATO, AR-15, M-16 compatible magazine. PMAGS utilize a resilient stainless steel spring for corrosion resistance. The Magpul Polymer PMAG Magazine fits the AR-15/M-16 series and other 5.56x45 NATO compatibleweapons. It features numerous enhancements intended to improve reliability, long-term storage, overall durability and is designed to fit 30 rounds without any need for downloading. Loaded PMAGS insert and lock easily in a closed bolt weapon. They also feature a special anti-tilt follower that prevents binding and improves feeding consistency. The proprietary Anti-Tilt Follower works in conjunction with the magazine body to stabilize the loaded round stack. The magazine body features a constant internal curve (unlike metal magazines with a curveto- straight transition) and allows for consistent round stack regardless of round count. This configuration prevents many of the common feeding malfunctions seen in other magazines such as nose-diving and bolt-over head failures. PMAGS Features: • Constant-curve internal geometry for smooth feeding • Anti-tilt, self-lubricating follower for increased reliability • Stainless steel spring for corrosion resistance • Textured gripping surface