The new MeoStar 50B Ballistic Hunting Turret (BHT) is designed to help shooters establish reliable, accurate aiming points at multiple distances. Multiple holdover points are specially calibrated for your weapon in conjunction with Meopta's simple, web-based ballistic calculator to give you a long range hunting scope. Additionally, the BHT is a self-assembled unit which fits to the top of your elevation adjustment on our MeoStar and MeoPro riflescopes. This model is made to fit Meostar R1 1-4x22 scopes.