The 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.MidwayUSA has just received a shipment of Swarovski optics to be sold to our customers at huge savings. These units are demos or refurbished optics and may have minor cosmetic blemishes (small scratches, dents or dings) which in no way impair function. Features:Aluminum Clip onNo sighting in required