The Hera Arms H15G Pistol Grip is made of fiberglass reinforced polymer to improve impact resistance. The H15G pistol grip provides an internal storage place, e.g. to store batteries and other equipment. In relation to the weight, it is one of the most stable pistol grips on the market. The H15G Grip is designed to be used with AR15/M4 systems featuring a standard a mil-spec receiver. The H15G Grip can also be used on systems using a grip interface compatible to the AR15/M4 system. Mounting hardware not included.