The Axcel AVX-31 Scope Lens Combo is a 31mm scope that offers various adjustment due to it's modular scope series design. The scope series offers various components which can be combined to build an archer's perfect scope, including sun shades, torque indicators, interchanageble ring pins, and a rheostat cover designed to control brightness in various lighting settings .The scope includes a #10-32 stainless steel rod, T Connector and incorporates an ambidextrious design. The combo includes a Doc's Choice lens available in a variety of powers.