GG&G 1in Flashlight Mounting Ring & .900 Ring Insert. The GG&G Ring Inserts give you the capability to attach smaller lights like the Streamlight TL2 or TL3 using 1-inch rings. The GG&G .900" Flashlight Mounting Ring Insert accomodates flashlights with an outside diameter of .900" which is too small to fit all of the inexpensive flashlight mounting rings available. Manufactured from Delrin to an inside diameter of .900" the GG&G Ring Mount Insert easily slips onto the flashlight and then installs into the GG&G One Inch Flashlight Mounting Ring GGG-1195 . Once the ring cap is tightened the flashlight is solidly mounted in place and ready to be installed on the weapon. Using these mounting ring inserts will allow you to use the GG&G Tactical One Inch Flashlight Mounting Ring to easily mount your TL2 or TL3 to you AR15 or other weapon system. The GG&G Flashlight Ring Reducers are also available as a combo pack with the GG&G 1" Mounting Ring. Specifications for GG&G Comp M4 Mount w/ QD Base 1247: Outside diameter: 1" Inside diameter: 0.9" Material: Delrin thermoplastic Features of GG&G Ring Reducers: Reduces 1" ring to .900" Fits Streamlight TL2 and Streamlight TL3 lights Lightweight Rugged Inexpensive Package Contents: GG&G Ring Inserts for Flashlight Mounts