Blaser Quick Detachable Aluminum Saddle Mount with 40mm rings Blaser QD Saddle Mount Complete with 40mm Low Rings. With a QD Mount, this allows the scope to be detached and/or replaced as often as required without affecting zero. The Saddle Mount also facilitates the exchange of rifle scopes with or without a rail. This Saddle Mount/ring combo is ideal for mounting the Swarovski dS riflescope on your Blaser R8 rifle. Blaser Saddle Scope Mount QD with 40 mm Rings, Aluminum C8800017