There are two significant factors in IR range. 1) A clean quality emitter:Tamiya, DT Creations or Impact are the best. 2) Sunlight: whether you are indoors and or under shade. The bright sunlight is then most significant factor to effect IR range. I have hit tanks over 100 feet away indoors at Danville. We do 80 mto 90 feet kills diagonal across the field all the time there. At our club battledays it all depends on sunlight and shade. Do bear in mind that the closer the emitter is to your long gun barrel the bigger the blind spot created by the barrel on the opposite side. My DBU from Phil hits out to 75 feet outdoors in party cloudy weather. I hope this helps.