if you are planning to get a weapon light for the HK usp series (without the use of rail adapter) this is weapon light for you. The only down side to the M2 is low lumen output.
Note: M3/M6 led conversion kit works with the M2 utl.
Pros: No rail adapter required
Cons: Low Lumen output
This review was written in the old system and had content requirements that are different than reviews written today.