Full disclosure: I am a Surefire dealer and do not sell Streamlight.
However, the reason for this is because I’ve simply seen too many broken Streamlights (mostly TLR-1s) to really recommend them—I’ve broken / seen broken Surefires before too, so I’m not implying that they’re an infallible product, however again, the rate of failure is much lower.
That being said, there are a lot of Streamlights out there in LE duty and even military use as they are relatively low cost and effective, and I know quite a few folks who are very happy with theirs and have never had an issue or broken theirs, even with heavy use.
I’ve run Surefire lights in various applications now since 60 incandescent lumens was considered blisteringly bright and owned almost every pistol light since the old “Classic” 310/610Rs and carried both the Nitrolon and X-Series overseas, so they’ve always been a stable and reliable companion, and I’ve never really gotten into the “fad light of the month” thing, though I have and have owned / tried various other manufacturer’s lights and many of them are good products. At this point, however, I’m so used to the switching on the X-series that I can’t really imagine going to a different manual of arms for a pistol light for any serious purposes.
If I were buying a new one now, I would absolutely, 100% recommend the X300T over the U (though I own several Us and think they’re great lights), and the high candella is great for a pistol application.
Also, just an interesting bit of “inside dish,” trivia, a lot of folks I know prefer the -A mounting footprint, myself included, for most applications, and most of my X-series lights are -A variants, however officially Surefire will always “prefer” the -B series because they either used to or still do pay licensing / royalties on the mounting / locking system.
However, the -B variants are definitely more flexible and adaptable with less variability in fit from pistol-to-pistol, which is important since very few pistol rails conform to a true MIL-STD 1913 spec, and while it doesn’t apply to 1911/2011s, many pistol dustcover rails are polymer, which tends to just inherently introduce more dimensional variation in the manufacturing process as well as accelerated wear which can further alter dimensions.
The -A variant rail lock can be tightened down / swap out clamping bars to achieve a more solid fit, however you’re essentially “fitting” the light to an individual pistol, which again, will be quite familiar to most 1911/2011 users, but is less familiar to users of other platforms, making it less friendly for those who may want to use a single light across multiple pistols or fleet / organizational users—again, the -B and “rail clamp” mounting footprint is just more forgiving and flexible.
~Augee