tsr
Great light, puts out as much light as the Surefire X300U from what I can tell from the online specs and personal experience. Perfect for the 43X MOS. Only problem is I've had the screws back out on my multiple times even after following the Streamlight installation instructions scrupulously. One time it flew off during shooting and the unit failed. Sent it to Streamlight and they fixed it for free. Have had issues with another Streamlight light as well. Their service department is pretty quick and I've never been charged, but would nice to have something a little more durable. Not sure if this was designed with the expectation being that it would endure high round counts. That being said, I really like the customizable switch system and the form factor. I'd go with a Surefire light but almost nobody reputable makes a good holster for Surefire's smaller pistol light series.