This UTG Model 4 Vertical Foregrip fits picatinny. It is a 5-position foldable foregrip with ergonomic finger grooves for a most comfortable grip. The practical side slide allows for ambidextrous use of the pressure pad insert and the clever end cap conceals the battery storage and controls grip mounting. It's picatinny mounting deck allows the foregrip to slide on and screw on tight.
