CCOP USA Universal Picatinny Rail Mount Adjustable Tactical Rifle Bipod BP-79S Extends from 6.3&quot; to 7.7&quot; Free swivel stud to picatinny mount adapter included Fits Picatinny and weaver rail Lock wheel and quick retraction button Foldable legs with spring tension control Foldable and Adjustable All Weather Capability Rugged Construction Rubberized feet for non-slip grip