We have two adapters that fit the Benjamin P-Rod pistol. 


This adapter extends the shroud 1.5 inches so there's no need to remove the suppressor to fill the gun.

https://donnyfl.com/products/benjamin-marauder-pistol-prod-extended-adapter-a77?_pos=1&_sid=9aa41717d&_ss=r 


It pairs nicely with a .22/25 Tanto 1/2x20 UNF thread, bolt endcap which will make this pistol very quiet.

https://donnyfl.com/collections/ldc/products/1-22-x-5-inches-tanto?variant=11782988759083


This adapter does the same thing, but without the extra length.

https://donnyfl.com/products/marauder-pistol-prod-1-2-x-20-unf-adapter-with-thread-protector?_pos=2&_sid=9aa41717d&_ss=r


Try it with a Tatsu #S31 for a great look and awesome silence.

https://donnyfl.com/collections/ldc/products/1-6-x-4-25-inches-tatsu?variant=33070871183403