This lightweight vertical foregrip also has a built-in bipod that comes into action at just a press of a button. The high density polymer material ensures that the grip is light and durable. Mounts on to picatinny rails using a thumbscrew so no tools are needed. Includes: Vertrical Foregrip with Integrated Sping-loaded Bipod Materials: Industrial Grade Polymer Compatibility: AR-15, Rifles with bottom rail Picatinny/Weaver rail Length Closed: 6.25 in Length Deployed: 8.50 in Weight: 6.7 oz Color: Black Warranty: Lifetime