Ultimate Arms Gear Deluxe Tactical Low Profile Folding & Height Adjustable Aluminum Universal Barrel Clamp On Rifle Shotgun Airsoft Paintball Weapon Bipod HEIGHT FROM 9" TO 11" HIGH TECH DURABLE ALUMINUM CONSTRUCTION SPRING-OPERATED CLEVER ADJUSTMENT WHEEL FOR WIDE RANGE OF BARREL SIZES - 11MM TO 19MM LOW PROFILE-MULTI-FUNCTION UNIVERSAL CLAMP-ON BARREL BIPOD