The Swarovski tMA thermal monocular adapter allows the tM 35 to be very easily converted from a hand-held device to a clip-on device. Together with your SWAROVSKI OPTIK rifle scope, the thermal imaging device creates a powerful combination that requires no sighting in and guarantees a 100% reliable point of impact - each and every time. The tMA thermal monocular adapter is compatible with SWAROVSKI OPTIK dS, Z8i, Z6i, Z5(i) and Z3 riflescopes. Exception: tMA 24 does not apply for 1.25-4x24, 1-6x24, 0.75-6x20, and 1-8x24 with SR.Midway is able to offer you this product at a great value because it has been used as a demo. It may have light handling marks, but still holds the same quality and warranty that is Swarovski. FeaturesAluminum Clip onNo sighting in required