I have a full size USP .45 and a UTL. I see two problems with this light. The activation switch is situated vertically and is activated horizontaly; EG: left to right for momentary light and right to left for permanent on. Being that the activation switch points staight down , it hits slightly on the holster when holstering the weapon. Due to this I have broken the switch leaver two times now and had to send it back to insight for repair.
Being that I feel this is unacceptable I purchased a GG&G rail adapter and an X200 light to replace the UTL. I really like how this light fits on the gun it is MUCH better for light activation because the switch leaver is horizontal and is activated by pushing straight forward for momentary light and down for permanent on. It is also smaller. I LIKE THIS COMBINATION A LOT!!
Now the problem. No one makes a duty holster or off duty holster for that matter, that will fit this weapon / light combination. It will not fit in a holster designed for the USP/UTL combo. (too loose)
With that said I will say that Insight has repaired my UTL three times and done so for free and fairly quickly. Also the GG&G adapter is VERY high quality, fits well and is thin and small. the
THE DISCLAIMER.
I tend to shoot a lot, from many differant positions, many times with the weapon very close to the ground and a lot of rounds down range. I am brutal on equipment and probibly should be an abuse tester for companys who provide after market equipment. If you dont shoot very much and arn't hard on equipment them YMMV.
Be safe, shoot well
D.