You may be interested in ALG-01.
Here is another flashlight ring mount produced from Fenix. The Fenix ALG-00 features the quick-release design to make it that much more easy to use and makes it very convenient. The ALG-00 does include the new anti-slip inner rubber ring. Since the ALG-00 has a new adjustable diameter many it can now hold and mount a bigger variety of lights. The ALG-00 comes with a new design that is perfect for your picatinny rail.