UPDATE: better printability threads.
This is a modular airgun silencer for .22 or .25
It is the same comncept of Huma Air moderators. You can experiment with adding more of less sections. In section or chamber you can decide to one or more different types of baffels. It all depends on your airgun what works best.
I tested the silencer with both the Snowpeak PP750 and RTI Airms Priest 2, two very different PCP airguns. 3 sections with each two simple baffels each worked best for the PP750. 4 empty sections worked best for the Priest.
I uploaded StartBus with ½ UNF 20 thread and an unthreaded one for you to tap in the threadsize you need.
One tip: be very careful when you first thread the StartBus onto the barrel as straight as possible. Yo can easily damage the threads. Also, do not remove/replace the startbus unnecessarily to prevent too much wear and tare. (It is made of plastic you know)