The Engage tactical pistol grip with interchangeable front and back straps (EPGI16) provides a combination of fit and function unequalled by the originally supplied M16/AR15/M4/HK416 pistol grip. Textured finger swells (3) and back straps (3) allow the user to custom fit the grip to their own hand size and comfort. A secure watertight storage compartment with customizable storage sled and a quick access tab diminishes all rattle.