The One Hundred Concepts ShockCollar is a specialized locking ring that keeps shock cords in place around your weapon light head. It provides a sleek, hassle-free alternative to ranger bands and is designed to be used with the One Hundred Concepts LightCap to protect the lens and reduce reflections. The ShockCollar makes it easy to remove the light head for quick battery changes or to operate rotating heads on certain weapon light models. This version is compatible with large LightCaps.