SCOPE JACK features:; Works with any scope with a flat section under turrets; Needs a minimum of 1/4in clearance between NATO/Pic rail and scope; NATO/Pic rail must be accessible under optic; In cases of minimal clearance, it may be necessary to remove the thumb screw and clamp, then slide the Scope Jack onto the rail from the side and reassemble; BUBBLE LEVEL SET features:; Magnetic level; NATO/Pic rail level/anti-cant device; Protective foam carrier with pouch