Low-profile Dragon Claw Clamp-on Barrel Bipod Diameters from 11mm  19mm, Steel Combat Stand,The Dragon Claw Clamp-On Barrel Bipod features high-tech, durable aluminum ,construction and a clever adjustment wheel that fits a wide range of barrel sizes from 11mm to 19 mm. It's user-friendly design sports a unique Posi-Lock , feature to prevent tipping, a rubberized comfort stand, extendable legs that can be adjusted for best shooting position, and arms that fold up for easy carry and storage. Fully Adjustable Barrel Clamping Feature, Spring Operated Barrel Locking/Unlocking Design and Posi-Lock Tip-Proof Extendable Legs  for Barrel TACTICAL BIPODS, Tactical Low-Profile Universal Foldable Clamp-on Bipod with