This light fits great on the H & K P2000. It's easy to adjust and very intuitive to use. I tried the MX6 on this gun but there was too much slop in the rail that allowed the light to move. The X2 doesn't move.
Pros: Excellent fit. Perfect size for a compact gun
Cons: no extra rail adaptors
This review was written in the old system and had content requirements that are different than reviews written today.