Knight's Armament Shoe Set Hyper/Vyper/One-4 Black. The top/helmet shoe affixes securely via anchor hardware for head-borne use while the bottom/weapon shoe adapts to the legacy thread station. The kit may be divided between two separate monoculars. The HVM is not for use with typical/legacy upper monocular housings. See KVC OSS for adaptation options for legacy monocular devices. Specifications for Knight's Armament HVM Shoe Set: Manufacturer: Knight's Armament Color: Black Last Chance: Yes Country of Origin: USA Package Contents: Knight's Armament HVM Shoe Set Knight's Armament 111787: Shoe Set Hyper/Vyper/One-4 Black