I have a hortonTR 175that came with a red dot scope thatstopped working.Itook the spring out of the dail-a-range and replaced thetop rail screw with a 10 x 1 3/4 ss screw thourgh the scope mount (put dail on 0 and leave the pin in) put the vari-zone on and it will be the best thing you could ever do!This cb can hit quarters @ 30 yards now and shoots the same with any type of arrow carbon or alum. and field points or spitfires and slick tricks all hit the same.