Red dots on a GLOCK. The perfect marriage of reliability and ability. Red dots on handguns, like on rifles, gives you the ability to shoot things faster and easier. So this is how NOT to do it:
It turns out the Trijicon Dual Illumination RMR is a terrible choice for a fighting firearm. The reticle completely or partially washes out if the firearm is in a darker area than the target. If you are pointing your gun down a dark hallway in your house illuminating the other end of the hallway with your weapons light or flashlight there is absolutely no reticle visible. This is Fail.
The Trijicon LED RMR and the Trijicon Adjustable LED RMR seem to be the correct choice at this time. The word is that they will eventually fail on a reciprocating slide, but that they last many, many thousands of round until they do, and if they do you still have sights on the handgun.
In my experience the LED RMR, the RM01 and RM02, work well in almost every situation. I have been able to briefly “wash out” the red dot when utilizing a very bright light like a Surefire X300U-A/B or the Streamlight TLR-1 HL. On a gun with a lessor light like the Crimson Trace Lightguard or the Surefire XC1 it appear that the LED RMR works very well. I have had no such issues with the Adjustable LED RMR.
In my conclusion I extol the reader to do not do like I did and try to save a few sheckles by going with the cheaper RMR. Go ahead and watch for those sales on Amazon and SlickGuns for the adjustable LED models for your handgun.