Uragun has changed the design of the shroud and monocore on this air rifle and if you have the new design we do not have a solution for this rifle.
If the front cap comes off the shroud, you can use this adapter to connect any 1/2x20 UNF thread moderator.
https://donnyfl.com/products/uragan-king-1-2-x-20-adapter-a79?_pos=1&_sid=9fcc83fcf&_ss=r
If the front cap is not removable from your shroud, you have the new design and I'm sorry I don't have better news for you.