The BVG Forearm Vertical Grip is a light weight modest vertical foregrip that appends specifically to the Picatinny rails with no extra requirements. It�s produced with polymer as other CAA foregrip items; the BVG Forearm Vertical Grip is equipped for positive control in all situations. - Increases comfort and shooting performance - Provides a comfortable gripping surface - No additional tools are required - Designed with a 7 ring groove provide operation control and prevents hand slippage - Made with a waterproof storage compartment for 3 CR123 batteries