Sixell Innovations makers of the Never Quit GripThe Never Quit GripTM is the first and only advanced polymer molded grip designed to fit the AR15/M16/M4 magazine well.(The grip also fits the Barret 468 and H&K 416)The grip's ergonomic design offers the shooter who uses the mag well a more anatomical and firm, yet textured fit to the hand.The Never Quit GripTM can be easily installed by simply releasing the trigger guard pin, sliding the grip over the mag well and then closing the trigger guard.