Easily and securely mount your Burris Thermal Clip-On (BTC) to your favorite riflescope with our precision-engineered Smarclip clip-on adapters. Designed for fast field deployment, these adapters feature a quick-detach cam lever that allows you to attach or remove the BTC in seconds, no tools required. Available in a full range of sizes (30mm to 63.5mm) to fit most riflescope objective lenses, each adapter screws directly onto the BTC and clamps firmly to the outside diameter of your optic's objective bell. Key Features: Quick-detach cam lever for fast mounting and removal Secure fit Compatible with objective lens diameters from 30mm to 63.5mm Rugged, field-ready construction Burris Blemished Products Burris blemished products exhibit minor cosmetic imperfections that originated during the manufacturing process, that will vary from blemished product to product. Blemished products and their included accessories are guaranteed by Burris to operate to the standards of a new product. All Burris blemished products are covered by the Burris Forever Warranty (View Warranty).