Vertical grips feature a waterproof internal storage department that's waterproof to 66'. Additional features include a dual locking bar mounting system and integrated pressure switch pocket. Grip attaches to any Picatinny-style or Weaver-style rail and features a waterproof internal storage compartment. The Quick-Detach model features a throw lever that locks the grip to the rail, to release the throw lever from the locked position a push button release must be depressed. Overall length is 4.87", switch pocket dimensions are 2.45" L x .65" W.