This is a Grip Pod Mount known as the Light Rail Mount, model GPS-DLR.
The Grip Pod(R) Dual Light Rail Module adds a dual rail system to the Grip Pod(R) System and allows the user to have a rear-activating button tactical light or laser at their fingertips" which does away with the pressure pad phone cord system. Simply attach the LRM to the Grip Pod(R) System and then add whatever tactical accessory to the LRM rail and continue with the mission. Works with all Grip Pod Models. Includes mounting tools. Grip Pod" Light Rail" Ambidextrous Side Rail Mount" Picatinny" Polymer" Black.
Features:
Works with all Grip Pod Models
Includes mounting tools
Ambidextrous Side Rail Mount