Designed for use with larger hands" the K2-XL Grip is similar to Magpul's MOE-K2 Grip - AR15/M4 but it's nearly 25% bigger. A drop in upgrade for the AR15/M4" it offers a more vertical grip angle" improving comfort and control on short LOP rifles that bring the primary hand in closer to the shooter's body. The larger size of the grip also allows proper finger placement in precision shooting" helping improve accuracy. XL grip cap" oil bottle grip core" and mounting hardware included. Other Magpul grip cores will not fit with the K2-XL grip cap.