CenterPoint Optics 32mm Open Reflex Sight, 4 Red/Green Reticles, 1 MOA, Weaver Mount CenterPoint Optics open reflex sight 32mm objective lens 4 reticles, each available in red and green Integral Weaver mount Unlimited eye relief 1 MOA windage and elevation adjustment 5.5 oz. 3.25" long Matte black finish Includes a CR2032 lithium battery, 2 hex wrenches and lens cover If you sight-in with one of the reticles, there is a very good chance that it will not be sighted-in when you change to another reticle. You will probably need to sight-in, again.