The RSG Rubberized Stout Grip provides an ideal and versatile Foregrip solution. - Advantages: - Non slip rubberized alligator ribbed texture grip for superior hold - Interchangeable use side picatinny rail or PTT port option - May rotate 180 degrees for ambidextrous use - Stout and compact design ideal for CQB - Waterproof small spare parts or batteries compartment - Durable & lightweight rubberized reinforced polymer construction - Quick and easy installation no gunsmith required - Included in the kit: - Dual sized 31mm/4.37in compartment cap extension. - optional side picatinny rail and adjustable PTT holder. - Compatibility: - 35mm long / 4 slots1913 MIL-STD picatinny rail