The Amoeba Barricade Stop Handguard Grip M-Lok.  For use on airsoft guns that have a M-Lok handguard.  Drop-in easy to assemble for a custom gun.  Mounts on M-Lok rails.  A low profile grip that is heavy duty for use on the battlefield.  Official Amoeba made product.
Dimensions:  1 inch tall x 2.25 inches long