The Monstrum Tactical Heavy Duty Offset 30mm Adjustable Scope Mount is built to mount 30mm scopes to any standard Picatinny rail equipped rifle. The offset design provides an additional 2.00 inches of forward extension, allowing extra flexibility for optimum eye relief and shooting position. The mount is 5.00 inches in total length at our lowest setting and 6.75 inches in max length. Using our Patent Pending design, the scope mount is adjustable in increments of 0.25 inches at 5 different settings which allows you to fit different types of 30 mm tube scopes. The mount is constructed of lightweight 6061 aluminum, the mount weighs a mere 6.80 ounces.