These Warne Maxima QD Scope Rings with Grooved Receiver are made to last a lifetime. The Maxima line of scope mounting supplies are designed to make sure that rifles with integrated receiver mounting rails are able to be mounted with scopes. Each manufacturer produces a proprietary design for mounting rails, so every ring model needs to be machined with exact tolerances to ensure a proper function and fit - a point Warne prides itself on. These rings are precision CNC machined and are created to fit a range of rifle models.