Ok so I got one of these laser rail mounts on ebay for like $24.00. Quality seems ok but calibration is off. They can be calibrated by adjusting four tiny Allen wrench screws in front. I Tried doing this and notice that if I adjust it for a target at 10ft I'm off on targets at 25ft. Yet if I adjust it for a 25ft target I seem to be a bit off on the 10ft target. Any one know what I'm doing wrong.
The laser is made by NCStar. Anyone else have or tried these? Here is picture (below).

The laser is made by NCStar. Anyone else have or tried these? Here is picture (below).
