The NEW X-15 HXP skeleton 50 round AR15 High Capacity Magazine not only includes our new Hexagonal P pattern, it is also one of our lightest weight AR style drum magazine. The most compact 50 round magazines ever produced for the AR-15. The X15 5.56 Drum Magazine is engineered around our proven coil magazine technology which allows side by side staging of ammunition in a single stack. Using our patented tension relief device, the X15-HXP-BLK can operate for an almost unlimited number of spring loads and can even perform in weapons with capabilities of up to 1100 rounds per minute. The streamlined design allows for zero separation of the ammunition during operation which prevents malfunctions and allows for an exceptionally compact profile. The X-15 AR15 High Capacity Magazine is shorter than a standard 30 round magazine and three inches shorter than a quad stack magazine. The user-friendly ergonomics and ability to use a sling make this magazine ideal for 3-gun competitors, and prone shooting position. Manufactured of the highest grade materials which give it unparalleled reliability and strength. The critical components of the mechanism are coated in Cerakote eliminating the need for lubrication.