Ya know, it seems hard to find 'mid range' rifle lasers, I had/used a green Aimshot LS8100 and it did seem to work fairly well, although the mount it comes with is junk, and I had to take apart and fuss with the "click-on" tail cap to get it to work right.
The LS8103 is pretty cool and seems like a better mounting system, a little more like an OTAL.