I own two Maglite XL50 flashlights and have purchased this handgrip for each. It does two things 1) makes it easy to use with handgrip over knuckles and flashlight in your palm, then push button on end readily accessible 2) flashlight does not roll.
It would work for the XL100 and XL200 also
Pros: Easy to install, Aides Maglite XL series for ease of use
Cons: None
This review was written in the old system and had content requirements that are different than reviews written today.