Constructed using injected molded polymer to withstand the toughest environments Compatible with 20mm picatinny rails Provides excellent comfort and assistance in rifle stability Secures firmly onto handguards using an allen key Designed with non-slip subtle finger grooves to increase handling In the Box 1X Tactical Angled Foregrip Specifications: Brand G-ForceBuild PolymerCompatibility 20mm Picatinny / Weaver RailsColor Dark Earth California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov