Kinetic Development Group, LLC, Surefire Pro, QD Light Mount, Fits M-LOK Rail Systems, Black Weight: 2oz Finish: Black Anodized Compatible with M-LOK Rail Systems The new Surefire Pro Kinect QD mount is simple and straight forward. If you have one of the new Surefire Pro weapon lights with the integrated swivel adjustment mount, you can replace the included pic rail or hard mount M-LOK mount with this QD M-LOK mount. KDG's patented Kinect mounting system allows for easy on and off of your weapon system to allow the end user to use their Surefire light on other weapons or accessories if needed. (SUREFIRE LIGHT NOT INCLUDED WITH MOUNT)