The LT659 is the QD solution for the newest version of the US Army’s M68 CCO (Close-Combat Optic). It is available in three sizes Tall Medium & Short. Like all LaRue mounts it is precision-machined out of bar-stock aluminum and matt black anodized to provide a durable non-reflective surface finish. The locking LaRue Speed Lever provides outstanding return to zero; the optic can be removed and replaced without loss of zero. Guaranteed. Assembly and adjustment only takes a few minutes then off to the range. The mount comes complete with replacement mounting screws with wrench QD adjustment wrench vial of blue Locktite and Instructions.