CBE Trek 2V Pro Vertical Pin Sight 2 Pin .019 LH Double Fiber Optic dots built into a slim single up;Lightweight design featuring multi-positioning mounting holes;12? of fiber optic management system;Machined aluminum construction;Hybrid elevation adjustment with dead stop for top pin;Micro windage adjustment;Adjustable 1st, 2nd, and 3rd axis;Lock down knob & multiple mounting;Accepts a 41mm lens and sunshad;Interchangeable peep alignment rings;Green, Red, Yellow, and Grey included;Sliding rheostat cover;Set up two floating pins with multiple indicator pointers;Rheostat sight light included