Its not a top of the range unit but it does work quite well. You can adjust its aim to match your zero.
The button on the pistol grip activates it and it calculates slope also.
Its easier than trying to pull a rangefinder out of your pocket when you are trying not to scare your quarry.
I got mine from http://www.customriflescopes.uk and they do the adjustable mount.
“Laserworks” make the unit and I have seen it advertised elsewhere.
I do tend to use it when I might otherwise guess!
