Will depend on the rifle and rings/bases being used... eg a long action Sako (older model) won't accept a short (between the bells) scope using the factory rings etc....not sure what you are trying to put the scope on... sometimes one piece bases work... also the weaver one piece can often accomodate shorter ring spacing etc etc. as other say there are also extension rings for some types of bases that may work - this is not an uncommon problem and there are some solutions that may work