The MR07 is a nice sturdy mount for Surefire X-series lights on a 1911 frame. Thanks to the included slide release, the mount is semi-permanent. Field stripping is required to remove the mount (be sure to keep your original slide release in case you want to remove the mount). The mount was a very tight fit on my Para-Ordnance P13, damaging the frame's finish during installation. I don't mind, since I plan to keep the mount on the gun permanently, but something to consider if you are afraid of scratching your finish. My X200B fits nicely and now makes my P13 worthy of home defense duties.
Pros: easy installation, beefy mount
Cons: very tight fit on my Para-Ord
This review was written in the old system and had content requirements that are different than reviews written today.