Flatline Ops Sniper series, fitting 30mm scope diameters, will keep you locked in and on target. A long range shot has many factors to take into consideration to be sure you are on target. Our ACCU/LEVEL™ system aids in the correction of "Cant Error" giving you dead-on true vertical hold. Each level is machined from advanced 6061-T6 aircraft aluminum and black hard anodized to protect it from the extremes of the outdoors. The level also features a dual position detent loacator to make sure you are locked into place before taking that critical shot. The level is also built to fit right or left handed shooters. Easy, high visibility fluorescent fluid level is quick to visualize and locate before each shot. You also have the ability to do fine adjustments to the level in the open and closed positions.