You will need this adapter for the Hammer.
https://donnyfl.com/products/umarex-hammer-shroud-kit?_pos=1&_sid=4e5cc5bf7&_ss=r&variant=42645917368363
I recommend the Emperor .45/.50 M18x1 #S5B.
https://donnyfl.com/collections/airgun-suppressors/products/donnyfl-emperor-v3?variant=14050945105963