This is my 3rd Streamlight weapon light and 2nd HL version. I have one on my HK USP compact and Glock 17. These lights have become invaluable when the power goes out around our house and I search the perimeter for anything or need to go check the breaker box.
However I have identified a downfall with oem switch. It is kinda on the flimsy side. Feels a little plasticy compared to my first TLR-1 regular version. The HL tail switch also has some sharp edges that can eat at the foam in a quick draw holster.
Additionally. weapon specific tail cap replacements can be installed. However at the cost of a complete and comfortable grip. Upon testing with my G17 I noticed that the light would not always engage remain engaged in a firing scenario. If your fingers are too skinny they will wedge upward against the top of the switch. or if you fingers are too large they will roll down below the switch. Both can lead to looser groups. I preferred to stick in the OEM tail cap that comes with the light because I achieved greater consistency.
Pros: Durability, Versatility, Usability
Cons: Flimsy switch, even worse gun specific switch
This review was written in the old system and had content requirements that are different than reviews written today.