Norotos PVS-15/18/21 Dovetail Adapter Black One Size. As easy as a turn and a slide gives you the option of turning Norotos helmet mounts that include the AKA II (#1840010) AKA II HYPER (#1940010) INVG HYPER (#1920010) and Lo-Sto Force-to-Overcome (#1962010) and Push Button (#1960010) into a realm of expanded versatility in becoming DOVETAIL compatible. Specifications for Norotos PVS-15/18/21 Dovetail Adapter: Manufacturer: Norotos Color: Black Additional Features: For Norotos PVS-15/18/21 Dovetail Condition: New Country of Origin: USA Package Contents: Norotos PVS-15/18/21 Dovetail Adapter Norotos 1840002BLK: PVS-15/18/21 Dovetail Adapter Black One Size