Did the trick to enable me to mount a Maglite XL200 to the Streamlight 12ga Mag Tube Rail Tactical Mount (available @ O.P.) on my Mossberg 500 12 Ga.
Pros: Easy installation, Lightweight, Good fit, Sturdy, Can be released
Cons: Somewhat Pricey
This review was written in the old system and had content requirements that are different than reviews written today.