The TX200HC has internal 1/2x20 UNF threads and can accept the #A21 male-to-male adapter so you can use any 1/2x20 UNF threaded moderator.
https://donnyfl.com/products/double-sided-1-2-x-20-male-adapter?_pos=1&_sid=0a2654802&_ss=r
Make sure you select a moderator that is a half size up to reduce the chance of pellet clipping. For a .177, select a .177/22, and for a .22, choose a .22/25. I recommend the Tatsu for the TC200HC.
https://donnyfl.com/collections/ldc/products/1-6-x-4-25-inches-tatsu
Springers generate a fair amount of mechanical noise as part of their shot cycle, and that noise sometimes becomes more obvious when the muzzle blast is moderated.