The LT139 quick detach scope mount rings are extended forward for use with rifle scopes that require longer eye-relief. The LT139 scope mount places the center-line of the optic 1.5" above the top of the rail for optimum cheek weld with a variety of flattop rail platform rifles. The 3 inch extended cantilever positions the scope far out front over the handguard, eliminating the need to span from the receiver to the hand guard. Precision-machined out of bar-stock aluminum and black matte anodized. Comes with adjustment wrench, locktite and install instructions.