The HOPCO mount is an HS01. Fits Leupold Deltapoint Reflex Sight, JPoint Micro Electronic Reflex Sight, Tasco Optima 2000, Vortex Razor (With Modification), and C-MORE STS (With Modification) per the MFG. https://www.hopcousa.com/product-page/hs01
https://www.hopcousa.com/product-page/hs01