You need this adapter for the Hatsan QE airguns. This works for any caliber .30 and lower. 

https://donnyfl.com/products/hatsan-qe-1-2-x-20-unf-adapter?_pos=1&_sid=a2680c9cc&_ss=r

I'd pair that with the #S61 Sumo.



Bully . 357



You will need this adapter for the Bully .357 

https://donnyfl.com/products/hatsan-qe-big-bore-357-m18x1-adapter-a30?_pos=7&_sid=1242716ab&_ss=r


I recommend the Ronin .357 M18x1 #S21.

https://donnyfl.com/collections/ldc/products/2-x-6-5-inch-ronin?variant=13286078251051


I also recommend the Emperor .357 M18x1 #S5A If silence is the priority

https://donnyfl.com/collections/ldc/products/2-x-10-5-inches-emperor-v3?variant=14050945073195