There is the option to hang the thermal off the objective of the LRP with one the fitted mounts and then you have perfect alignment and no worries about different mount heights and can leave day scope mounted as-is...this would be for most any of the clip-ons. One other thing to keep in mind is that most of the images from thermal clip-ons will start to pixelate(sp.?) at around 8-10x, so you will generally be running the slow on the lower end of the magnification range.