This is a Ergo Grip Accessory, model 4201-SS.
ERGO's AR-15 Surestop Tactical Picatinny Rail Hand Stop is useful on short barrel rifles and shotguns. Short barrel rifles and shotguns leave you guessing where to place your hand and this hand stop can act as a positioning device to eliminate the guess work. Black polymer construction is durable and mounts easily to your picatinny or weaver rail.
Features:
Useful on short barrel rifles and shotguns
Can act as a hand positioning device
