Product Description from X-Products:
The NEW X-15 HXP skeletonized 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.
Fits most M16/AR-15 rifles, Bushmaster ACR, SCAR 16 and Stanag rifles with improved M4 feed ramps. Variants of this versatile magazine work in 5.56×45/.223 and some 300 AAC Blackout *. May require modification to work in Robinson Arms XCR. Will not work in IMI Tavor and many Noveske receivers. No tools necessary to load or operate. Manufactured in the USA. Enjoy our no hassle lifetime warranty. If you have a problem we pay for the shipping, repair or replacement. If you aren’t satisfied, send the product back for a full refund.
* 300 AAC Blackout with 208 gr bullets will work. 220 gr will work but causes added stress on the internals. Soft Point and hollow point munitions are not recommended for use with the drum.