This is a Magpul Industries Mount known as the Light Mount V-Block and Rings, model MAG614-BLK.
The versatile Light Mount V-Block and Rings is a nearly-universal mounting solution for attaching a handheld light to compatible Magpul light mounts. Constructed of reinforced polymer and milspec-anodized aluminum" the Light Mount V-Block and Rings allow the user to install lights with a body diameter from .75" to 1.04" onto the MOE Scout Mount as well as a variety of M-LOK Cantilever and Offset Mounts in both Aluminum and Polymer*. In conjunction with these compatible Magpul mounts" the Light Mount V-Block and Rings allow the shooter unparalleled versatility to attach nearly any popular handheld tactical light onto almost any weapons platform. All hardware and tools necessary for attachment directly to compatible mounts is included. Made in U.S.A.
Features:
For attaching a handheld light to compatible Magpul mounts
Accepts most lights with a body diameter of 0.75 to 1.04
Attaches to Magpul mounts
