Interchangeable textured finger swells (3) and back straps (3) provide a positive grip surface with wet or gloved hands and allow the user to customize the fit. A combination of fit and function unequaled by the originally supplied M16/AR15/M4/HK416 pistol grip Designed for M16/M4/AR15/HK416 Any combination of interchangeable back straps and finger swells allow for a custom fit for any sized hand Grip angle replicates M16 while not affecting trigger contact Secure water resistant storage compartment Customizable storage system with quick access tab diminishes rattle Weight:3.7oz Height: 4.847" Width: 1.220" Length: 3.196"