silencer for unthreaded Benjamin NT

I am looking for a suppressor for a Benjamin NT Varmint Rifle, Model BVNK 92SX in .22. It has a 7/8" OD unthreaded muzzle, so I am looking for a slip-on suppressor or adaptor.

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Make sure there is no dovetail grooves. Here is your mm on the third column. Here is the route I would take. He can make it happen (comes to you by way of DonnyFL’s recommendation:

https://donnyfl.com/collections/adapters/products/custom-adapter