The Arisaka Ring
Light Mount provides a flexible yet secure way to attach
handheld lights to your handguard. It uses a vertically anchored ring system which comes in
two sizes to accommodate a wide variety of lights. The clamping ring
will accept light bodies with a diameter from 1.00" to 1.03." A light
can be installed and removed without having to take the mount off your
handguard.
The offset placement of the light while using the mount is designed
to allow clearance with most front sights. For example, a 1.03" light
like the Surefire G2 will work with the Magpul Gen 2 MBUS on a Noveske
NSR, which is one of the thinnest handguards at 1.48" wide.
Weight: 1.0 oz
The mount is CNC machined from 6061-T6 aluminum and MIL-A-8625 Type III hard coat anodized. Requires a 3/32" Allen wrench for installation (not included). Made in the USA.
Works great 
It was what I wanted 