Ultimate Arms Gear 6.5"-9" Folding Adjustable Tactical Hunting Rifle Bipod For Weaver Picatinny 1913 Rail Clamps directly to your rail system. With adjustable legs with a collapse button, transitioning to different positions is not an issue when setting up your next big shot. Adjustable legs with retract/collapse button Matte black aircraft grade aluminum Compatible with Weaver / Picatinny 1913 Rails Weight: 9.2 oz. Height: 6.5"-9"